MP Police Constable : (8 Nov 2025, Shift 2) Memory-Based Paper (Previous Year Paper)

The Correct Answer is English.

• English is Chandigarh's sole official language.
• The majority of the population speak Hindi (73.60%) while 22.03% speak Punjabi.
• Government schools use textbooks from English, Hindi, and Punjabi.
• On 1 November 1966, Haryana's newly formed state was carved from the eastern portion of East Punjab to create a new state in that portion for the majority of Haryanvi-speaking people, while East Punjab's western portion retained a majority of Punjab-speaking people and was renamed Punjab's.

Onam is the most important festival of Kerala. It marks the beginning of the year.

The correct answer is ​Uttar Pradesh

• Uttar Pradesh is the highest milk-producing state of India.

Key Points

• It produces around 15.72%** of the country's** total milk production.
• In the year 2022-23, India produced 230.58 million tonnes of milk. This marks a 22.81% increase in milk production over the past five years. Uttar Pradesh is the state with the highest milk production, accounting for 15.72% of the total milk production in India. Rajasthan follows closely with 14.44%, while Madhya Pradesh, Gujarat and Andhra Pradesh contribute 8.73%, 7.49% and 6.70% respectively to the total milk production.
• Indian Dairy market is considered to be the largest and fastest-growing market in the world.
• The major countries are UAE, Bangladesh and other Southeast Asian countries.

The correct answer is Uttar Pradesh.

Chipko movement first starts in the state of Uttar Pradesh in India.

Key Points

• Chipko movement was a forest conservation movement in India.
• Chipko movement is also called 'Chipko Andolan'.
• The movement started in 1973 at Reni village in the Chamoli district of the Garhwal region in Uttarakhand, then a part of Uttar Pradesh
• The Chipko Movement was launched by Chandi Prasad Bhatt and Sunder Lal Bahuguna against large-scale cutting of trees by timber contractors in the Uttarakhand hills.
• Sunder Lal Bahuguna has spent a large portion of his life fighting for the preservation of forests in the Himalayas.
• Local hill women from villages were organized and made aware of the ecological threats in the hills. They actively participated in the campaign.
• They embraced or hugged the trees when the timber contractors reached and forced them to leave.
• Due to the participation of local people, it led to the efficient management of forests.
• This novel campaign for saving hill forests and greenery spread all along the hill region and to Karnataka in the South also in 1983.

The correct answer is Shanti Ghosh.

Key Points

• Matangini Hazra (1869-1942):
• She was an Indian revolutionary who participated in the Indian independence movement until she was shot dead by the British Indian police in front of the Tamluk Police Station on 29 September 1942 during the Quit India Movement.
• She was affectionately known as Gandhi Buri, Bangla for old lady Gandhi.
• In 1905, she became actively interested in the Indian independence movement as a Gandhian.
• In 1932, she took part in the Non-cooperation Movement and was arrested for breaking the Salt Act.
• Kanaklata Barua:
• Kanaklata Barua also called Birbala and Shaheed (martyr), was an Indian independence activist and AISF leader who was shot dead by the British police while leading a procession bearing the National Flag during the Quit India Movement of 1942.
• Barua was born in the Borangabari village of the undivided Darrang district of Assam as the daughter of Krishna Kanta and Karneshwari Barua.
• Barua joined the Mrityu Bahini ('Death Army'), a death squad comprising groups of youth from the Gohpur subdivision of Assam, which was formed by Jyoti Prasad Agarwala, in line with Gandhi's 'Do or Die' call.
• She died on 20 September 1942 (aged 17) in Borangabari, Gohpur, Assam.
• Aruna Asaf Ali
• Aruna Asaf Ali was born on 16 July 1909, into a Bengali Brahmin family in Kalka, Punjab, British India (now in the Indian state of Haryana).
• She was a publisher, political activist, and educator from India.
• She was an ardent member of the fight for Indian independence, and she is well known for hosting the Indian National flag at the Gowalia Tank Maidan in Bombay in 1942, during the Quit India Movement.
• In the Indian Independence Movement, Aruna Asaf Ali played a significant role.
• After getting married to Asaf Ali, she joined the Indian National Congress and took part in the Salt Satyagraha's public processions.
• She was imprisoned in 1931 in violation of the Gandhi-Irwin Pact, which called for the release of all political prisoners, since she was accused of being a wanderer.
• Shanti Ghosh
• A revolutionary phase in Bengal saw large scale participation of young women under Surya Sen's leadership.
• They provided shelters, acted as messengers and custodians of arms and fought guns in hand.
• Preeti lata Waddekar died while conducting a raid, while Kalpana Dutt was arrested and tried along with Surya Sen and given a life sentence.
• In December 1931, two school girls, Shanti Ghosh and Suniti Chaudhary, shot dead the district magistrates.
• On the 14^th of December 1931, Shanti and Suniti, aged 14 and 15 years respectively, innocently entered the bungalow of Magistrate Mr. Stevens with a pistol and shot him dead at point-blank range. Spared of capital punishment due to her age; she was sentenced to life imprisonment and made to suffer all sorts of physical torture but did not yield.
• Released in 1939 at Gandhi’s intervention, she resumed her studies. She was a member of the West Bengal Legislative Assembly (1962-67); later also of the Legislative Council.

The correct answer is Bodo, Dongri, Maithili and Santhali.

Key Points

• Eighth Schedule:
• The eighth Schedule of the Constitution specifies 22 languages (originally 14 languages).
• These are Assamese, Bengali, Bodo, Dogri (Dongri), Gujarati, Hindi, Kannada, Kashmiri, Konkani, Mathili (Maithili), Malayalam, Manipuri, Marathi, Nepali, Odia, Punjabi, Sanskrit, Santhali, Sindhi, Tamil, Telugu and Urdu.
• Sindhi was added by the 21^st Amendment Act of 1967.
• Konkani, Manipuri and Nepali were added by the 71^st Amendment Act of 1992.
• Bodo, Dongri, Maithili and Santhali were added by the 92^nd Amendment Act of 2003.
• In terms of the constitutional provisions, there are two objectives behind the specification of the above regional languages in the Eighth Schedule:
• The members of these languages are to be given representation in the Official Language Commission.
• The forms, style and expression of these languages are to be used for the enrichment of the Hindi language.​

The correct answer is 25 Member.

Key Points

• Quorum
• The quorum refers to the minimum number of members required to be present for conducting a meeting of the house.
• The Constitution has fixed one-tenth strength as a quorum for both Lok Sabha and Rajya Sabha.
• Thus, to conduct a sitting of Lok Sabha, there should be at least 55 members present while to conduct a sitting of Rajya Sabha, there should be at least 25 members present.

The correct answer is Coal and Iron.

Key Points

• Among the options, coal and iron are the most important minerals occurring in Madhya Pradesh.
• In terms of mineral production, Madhya Pradesh ranks third next only to Jharkhand and Chhatisgarh.
• India's largest Open Cast Copper mine is located at Malajkhand(Balaghat district) in Madhya Pradesh.
• Madhya Pradesh contains 7.71% of the total coal reserve of the country.
• The main minerals occurring in Madhya Pradesh are:
• Coal.
• Iron.
• Limestone.
• Manganese ore.
• Bauxite.
• Copper ore.
• Dolomite.
• Fire clay.
• Madhya Pradesh is the sole producer of diamonds in the country.
• The only working mines of diamond in India are in Panna, Madhya Pradesh.

The correct option is 1 i.e., 250 km / sec.

• Speed of orbit of the sun and solar system around the centre is 250 km/sec.
• The speed of orbit of the earth around the sun is 30 km/sec.
• The Moon orbits Earth at a speed of 1.022 km/sec.
• Venus's average orbital speed is 35.02 km/s.
• Mars rotates on its axis approximately every 24.6 hours. This period is often referred to as the "sol," which is a Martian day. It's only a little more than an Earth day, which is about 24 hours.

The correct answer is Hanuwantiya.

Key Points

• Jal Mahotsav is an annual water festival celebrated at Hanuwantiya Tapu in the Khandwa district of Madhya Pradesh, India.
• It is organized by the Madhya Pradesh Tourism Board to promote adventure tourism and water-based activities.
• The festival typically spans 80 days and offers visitors a mix of adventure, culture, and leisure activities.
• Key attractions include water sports (like jet skiing, parasailing, and banana boat rides), cultural performances, and local cuisine.
• The event is held near the Indira Sagar Dam on the Narmada River, which provides a scenic backdrop for the festivities.

Additional Information

• Hanuwantiya Tapu: A man-made island developed as a tourist destination, located near the backwaters of the Indira Sagar Dam in Madhya Pradesh.
• Indira Sagar Dam: One of the largest reservoirs in India, built on the Narmada River, providing an ideal environment for water-based recreational activities.
• Cultural Significance: Jal Mahotsav also showcases the rich cultural heritage of Madhya Pradesh through traditional dance, music, and handicrafts.
• Adventure Activities: Apart from water sports, activities like hot air ballooning, trekking, ziplining, and camping are also popular attractions during the festival.
• Tourism Promotion: The festival is a key initiative under the Madhya Pradesh government’s efforts to boost eco-tourism and attract both domestic and international visitors.

The correct answer is Tamil.

Key Points

• The Ministry of Culture is the nodal ministry providing guidelines for classical languages.
• Currently 11 languages i.e, Tamil, Sanskrit, Kannada, Telugu, Malayalam, Odia, Marathi, Pali, Prakrit, Assamese and Bengali enjoy the classical language status.
• The Government of India declared Tamil was the first language conferred with the status of Classical Language in India in 2004.

Additional Information

• A Centre of excellence for studies in classical languages is also there in India.
• All the classical languages are also listed in the 8^th schedule of the Indian Constitution.
• Sanskrit was given the status as a Classical Language of India in 2005.
• In 2008 Kannada and Telugu were given the status as Classical Languages of India.
• Malayalam was declared as a classical language in 2013.
• In 2014, Odia was also given the status of the Classical language.

Important Points

• The Union Cabinet chaired by Prime Minister Shri Narendra Modi has approved to confer the status of Classical Language to Marathi, Pali, Prakrit, Assamese and Bengali languages.

The correct answer is 2.5%.

Key Points

• Freshwater:
• Freshwater is water that contains only minimal quantities of dissolved salts, thus distinguishing it from seawater or brackish water.
• All freshwater ultimately comes from precipitation of atmospheric water vapor, reaching inland lakes, rivers, and groundwater bodies directly, or after melting of snow or ice.
• Freshwater present on earth is 2.5%.
• Freshwater is any naturally occurring water containing low concentrations of dissolved salts and other total dissolved solids.
• Though the term specifically excludes seawater and brackish water, it does include non-salty mineral-rich waters such as chalybeate springs.
• Freshwater may include water in ice sheets, ice caps, glaciers, icebergs, bogs, ponds, lakes, rainfall, rivers, streams, and groundwater contained in underground aquifers.
• Sources:
• The original source of almost all freshwater is precipitation from the atmosphere, in the form of mist, rain, and snow.
• Freshwater falling as mist, rain, or snow contains materials dissolved from the atmosphere and material from the sea and land over which the rain-bearing clouds have traveled.
• The precipitation leads eventually to the formation of water bodies that humans can use as sources of freshwater: ponds, lakes, rainfall, rivers, streams, and groundwater contained in underground aquifers.
• In coastal areas, freshwater may contain significant concentrations of salts derived from the sea if windy conditions have lifted drops of seawater into the rain-bearing clouds.
• This can give rise to elevated concentrations of sodium, chloride, magnesium, and sulfate as well as many other compounds in smaller concentrations.

The correct answer is Aadi Perukku .

Key Points

• The festival of Tamil Nadu dedicated to the river Cauvery is Aadi Perukku.
• Aadi Perukku is a unique Tamil festival celebrated on the 18^th day of the Tamil month of Aadi (mid-July to mid-August).
• This festival is specifically dedicated to the life-sustaining water resources, and particularly to the river Cauvery.
• The Cauvery River is vital for the agriculture and livelihoods of the people of Tamil Nadu.
• Aadi Perukku marks the commencement of the southwest monsoon's impact on Tamil Nadu, which typically leads to a rise in the water level of the Cauvery and other rivers.
• The festival is observed with great enthusiasm, especially in the river delta regions of Tamil Nadu.
• People gather near the banks of the river Cauvery to offer prayers and express their gratitude for the water it provides.
• Special rituals and ceremonies are performed to honor the river goddess, often depicted as Cauvery Amman.
• Women play a significant role in the celebrations, offering colored rice, flowers, and other auspicious items to the river.
• It is a tradition to float lamps made of banana stems or coconut shells in the river as a symbol of reverence.
• Families often prepare special festive foods, including a variety of rice dishes, and enjoy them together near the riverbanks.
• The festival also signifies the beginning of the agricultural season, with prayers offered for a bountiful harvest.
• Aadi Perukku underscores the deep connection between the people of Tamil Nadu and their water resources.
• It highlights the importance of rivers in their culture, economy, and daily lives.
• While Pongal is a major harvest festival of Tamil Nadu, it is primarily a thanksgiving to the Sun God, nature, and farm animals for a successful harvest, and not specifically dedicated to the river Cauvery.
• Onam is the state festival of Kerala and is associated with the mythical king Mahabali; it has no direct connection to the river Cauvery or Tamil Nadu's river-centric traditions.
• Thai Poosam is another significant Tamil festival, dedicated to Lord Muruga, and is celebrated during the Tamil month of Thai (mid-January to mid-February); it is not specifically linked to the river Cauvery.
• Aadi Perukku uniquely celebrates the river Cauvery as a source of prosperity and life, emphasizing its crucial role in the region's agricultural prosperity and cultural heritage.
• The festive atmosphere around the riverbanks during Aadi Perukku showcases the community's respect and dependence on this vital water source.
• This festival serves as a reminder of the importance of water conservation and the sustainable management of river resources.
• The traditions and rituals associated with Aadi Perukku have been passed down through generations, reinforcing the cultural significance of the river Cauvery in Tamil Nadu.

The Correct Answer is 5.

In News

• Anubhav Awards, 2025 to be conferred by the Union Minister of State, Department of Pension & Pensioners' Welfare, Dr. Jitendra Singh on 18.08.2025 under National Anubhav Awards Scheme, 2025.

Key Points

• The Anubhav Awards 2025 will be conferred by the Union Minister of State, Dr. Jitendra Singh, on August 18, 2025.
• The awards will be given under the National Anubhav Awards Scheme, 2025.
• A total of 5 Anubhav Awards and 10 Jury Certificates will be awarded from 1459 write-ups published by 42 Ministries/Departments/Organizations.
• This year, for the first time, CPSEs (Central Public Sector Enterprises) and PSBs (Public Sector Banks) have participated and made it to the final list.
• The Anubhav platform was launched in March 2015 by the Department of Pension & Pensioners' Welfare, under the Prime Minister’s directions, to share experiences of retiring/retired government employees.
• The Annual Awards Scheme was introduced to incentivize and encourage retiring/retired employees to submit their experiences through write-ups.

The correct answer is Public Account Committee, 22.

Key Points

• The Public Accounts Committee was introduced in 1921 after its first mention in the Government of India Act, 1919 also called Montford Reforms.
• The Public Accounts Committee is now constituted every year under Rule 308 of the Rules of Procedure and Conduct of Business in Lok Sabha.
• The Public Account Committee is headed by the Leader of the Opposition and it has the function of the audit of revenue and expenditure of the Government of India.
• There is a total of 22 members in this committee in which 15 are from the Lok Sabha and 7 are from the Rajya Sabha.
• K. C. Venugopal is the chairman of the Public Accounts Committee (PAC) of Parliament
• The Estimates Committee is formed in order to keep an eye on the utilization of funds by the government departments and ministries.

The correct answer is 40.

Key Points

• Jharkhand possesses around 40% of India's total mineral reserves, giving it an abundance of mineral wealth.
• The state is the sole producer of certain minerals in India, such as coking coal, uranium, and pyrite.
• Jharkhand is a blessed land with the natural gift of immense mineral potential and other natural resources.
• Jharkhand state enjoys a strong position on the mineral map of the country.

Important Points

• No region in the world is gifted with such a vast mineralization in such a close vicinity as is there in Jharkhand.
• The state has potential deposits of energy, ferrous, non-ferrous, fertilizer, industrial, refractory, atomic, strategic, precious, and semi-precious groups of minerals.
• The state stretches over 79,714 square kilometers in geographical areas with 29.61% forest area and owns about 40% of total mineral resources of India.
• The State Occupies 1^st position in coal reserves, 2^nd position in Iron, 3^rd position in Copper ore reserve, 7^th position in Baxuite reserve and is the sole producer of prime coking coal.
• Presently Jharkhand state is annually producing about 160 million tonnes of various types of minerals worth Rs 15,000 crore and generating mineral revenue to the tune of about Rs 3,500 crore.

The correct answer is Baghelkhand.

Key Points

• Atari is the folk dance of the Baghelkhand region of Madhya Pradesh.
• Performed by Bhumiya and Baiga Tribe.
• It is a dance in a circular path and in it, 2 men stand on the shoulder of one and dance.

Additional Information

• Baghelkhand- Folk Dance
• Kehara Dance
• It is performed by men and women in different styles.
• The melody of the flute adds charm to the dance.
• Furhari is the main feature of this dance in which women hold hands and take chakri.
• Dadra Dance 
• Famous dance of Kol, Kotwar, and Kehar tribe.
• Both men and women take part in this dance.
• Kalsa Dance
• Performed by Ahir and Gadariya Caste.
• Both men and women perform Kalsa in question-answer style.
• Kamli Dance
• It is also known as Sajan-Sajni Dance.
• Performed on the occasion of marriage by both men and women in question-answer style.
• Lakadbagha Dance
• Performed on the occasion of marriage.

The correct answer is Arawali Hills.

Key Points

• The Aravalli Range is a mountain range in Northwestern India, running approximately 692 km (430 mi) in a south-west direction, starting near Delhi, passing through southern Haryana and Rajasthan, and ending in Gujarat.
• The highest peak is Guru Shikhar at 1,722 meters (5,650 ft).

Additional Information

• Amarkantak is situated in the Anuppur district of the state of Madhya Pradesh at an altitude of 1065m at the meeting place of the Vindhya and Satpura mountain ranges amidst sylvan surroundings.
• It has an average elevation of 1048m.
• The Vindhya Range (also known as Vindhyachal) is a complex, discontinuous chain of mountain ridges, hill ranges, highlands, and plateau escarpments in west-central India.
• The exact extent of the Vindhyas is loosely defined, and historically, the term covered a number of distinct hill systems in central India, including the one that is now known as the Satpura Range.
• Today, the term principally refers to the escarpment that runs north of and roughly parallel to the Narmada River in Madhya Pradesh and its hilly extensions. Depending on the definition, the range extends up to Gujarat in the west, Uttar Pradesh and Bihar in the north, and Chhattisgarh in the east.
• The Satpura Range is a range of hills in central India.
• The range rises in eastern Gujarat state running east through the border of Maharashtra and Madhya Pradesh to the east till Chhattisgarh.
• The range parallels the Vindhya Range to the north, and these two east-west ranges divide Indian Subcontinent into the Indo-Gangetic plain of northern India and the Deccan Plateau of the south.

The correct answer is option 4 i.e Gujarat*.*

• The length of the coastline in India is 7516.6 km.

• Out of 7516.6 km, Mainland consists of 5422.6 km and Island Territories consists of 2094 km.

• Gujarat has the largest coastline in India.

• Andra Pradesh has the longest coastline in South India.

• Gujarat is a state on the western coast of India with a coastline of 1,600 km.

• Capital city: Gandhinagar.

• Kandla is the major seaport of Gujarat.

• The Sabarmati is the largest river in Gujarat

• The famous Indus Valley Civilisation, such as Lothal, Dholavira, and Gola Dhoro are located in Gujarat.

• Gir Forest National Park, only Asiatic lion park in the world, is in Gujarat.

• Alang ship breaking yard is in Gujarat.

The correct answer is ​Nephoscope.

Key Points

• Nephoscope is a scientific device used for measuring the altitude, direction, and velocity of clouds.
• It was used in the 19^th century.
• Nephoscope was invented by Carl Gottfrid Fineman, Louis Besson, and Mikhail Pomortsev.
• The two basic designs of nephoscope are:
• Direct-vision nephoscope.
• Mirror nephoscope.

Additional Information

• A Pyrgeometer is a scientific device used to measure the infrared radiation spectrum in the atmosphere.
• A Nephelometer is an instrument used to measure the concentration of suspended particulates in a liquid or gas colloid.
• A Venturimeter is a scientific device used to measure the flow rate of fluid through a pipe.

Mistake Points

• Don't confuse with "Nephometer" which is an instrument used in measuring the amount of cloudiness.

The correct answer is Option 3, i.e Zero.

Key Points

• An object travels northwards with a constant velocity. The net force acting on the object will be zero.
• Please note that constant velocity means there is no acceleration. (Acceleration literally means change in velocity).
• As per Newton’s second law of motion, Force= mass x acceleration.
• As acceleration = zero.
• Net acting force is also zero.

The correct answer is KNO3.

Key Points

• Potassium nitrate is a chemical compound with the chemical formula KNO3
• Potassium nitrate also called saltpeter or niter, a white solid soluble in water formed by fractional crystallization of sodium nitrate and potassium chloride solutions.
• It occurs naturally as niter in rocks in India, South Africa, and Brazil.
• When heated it decomposes to give the nitrite and oxygen.

The correct answer is Convection.

Key Points

• Convection is a mode of heat transfer by the actual motion of matter.
• Convection is a process in which hot, less dense materials rise upward and are replaced by colder, more dense materials.
• Convection is possible only in fluids.
• Convection can be either be natural or forced.
• Gravity plays a major role in natural convection.
• Material is forced to move by a pump or by some other physical means in forced convection.
• Forced-air heating systems in the home, the human circulatory system are the common examples of forced convection.

Additional Information

• The three distinct modes of heat transfer are:

1. Conduction.
2. Convection.
3. Radiation.

• The process of heat transfer without any medium is called radiation.
• Conduction is the process of heat transfer between two adjacent parts of a body due to their temperature difference.
• Condensation is the process where water vapor becomes liquid.

The correct answer is Scattering.

• Scattering of light is the phenomenon in which light rays get deviated from their straight path on striking an obstacle like dust or gas molecules, water vapors, etc.
• The scattering of light gives rise to many spectacular phenomena such as the Tyndall effect.
• Some examples of Scattering of light:
• The red color of the sun at sunrise and sunset.
• The red color is used as a danger signal.

Important Points

The correct answer is iris.

Key Points

• The iris regulates the amount of light entering the eyes.
• Iris is the coloured part of the eye that gives pigment to the eye.
• It is attached to ciliary muscles which will contract and expand to accommodate light in required amounts.

Additional Information 

• The cornea is the outermost layer of the eye and focuses the entry of light into the eye.
• ​A pupil is a dark circle located at the centre of the iris. It will adjust itself to the amount of light entering the eye.
• The eye lens adjusts its shape and thickness as required to help focus on the retina.
• The retina is the light-sensitive membrane behind the eye where the image is formed.
• The visual signals regarding the image formed are transmitted to the brain in the form of electrical signals through the optic nerves.

The correct answer is Chlorine.

Key Points

• The element having electronic configuration 2,8,7 is Chlorine.
• It is the member of group 17. It is a p - block element which means the valence shell containing the valence shell electrons in the p subshell.
• The systematic way of writing the configuration is 1s2, 2s2 2p6, 3s2 3p5. so the last 5 electrons are filled in p subshell.
• Chlorine is a chemical element with the symbol Cl and atomic number 17.
• The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them.
• Chlorine is a yellow-green gas at room temperature.

Additional Information 

• Chlorine has a variety of uses:
• It is used to disinfect water and is part of the sanitation process for sewage and industrial waste.
• During the production of paper and cloth, chlorine is used as a bleaching agent.
• It is also used in cleaning products, including household bleach which is chlorine dissolved in water.

The correct answer is Diffusion.

Key Points

• Diffusion: Intermixing of particles of two different types of matter on their own is called diffusion
• Diffusion is process in which particles of matter get intermixed on their own, this happens due to entrance of particles into the spaces. Diffusion is a result of the kinetic properties of particles of matter. The particles will mix until they are evenly distributed
• Condensation is the process where water vapour becomes liquid. It is the reverse of evaporation, where liquid water becomes a vapour.
• Fission: The splitting of an unstable atomic nucleus into two or more nuclei is known as fission.
• Effusion refers to the accumulation of fluid in an anatomic space, usually without loculation.

The correct answer is option 3, i.e. Madhya Pradesh.

Key Points

• Bandhavgarh National Park is located in Madhya Pradesh.
• Bandhavgarh National Park is known for its large population of Royal Bengal Tigers.
• Bandhavgarh National Park was declared a National Park in 1968 and then became Tiger Reserve in 1993.
• Some Important national park in India:

Concept :

Ionization potential (I.P)

• It is the energy required to take out the outermost electron from an isolated gaseous atom.
• The ionization energy of a chemical element is expressed in kilojoules or electron volts.
• The energy required to remove the first electron is called the 1^st ionization potential.
• The more stable the atom, the higher is its I.P.

The ionisation potential depends on -

• The size of the atoms- Smaller the size of the atoms, the higher is the I.P value.
• The penetration power- It is easier to remove an electron from the more diffused shell electron than a less diffused one.The ease of removal follows the order- f > d > p > s.
• The charge of the species- the greater the positive charge, the higher is the I.P value. I.P. value is directly proportional to the positive charge and inversely proportional to the negative charge.
• Electronic configuration- it is harder to remove an electron from a stable electronic configuration- fulfilled and half-filled.

Explanation-

• Let us see the given molecules-
• The given elements belong to period 2 of the periodic table.
• Their outermost subshell is 2p.
• The 1^st I.P value will be the energy required to remove the electron from the 2p subshell which is the same for all the given elements
• Thus, the deciding factor here is their electronic configuration.

Let us examine their electronic configuration

• Boron B (5) = 1s² 2s² 2p¹

.

• only one electron resides in the 2p of Boron and after removing it will have fulfilled 2s so it gives up the electron readily.

• Carbon C (6) = 1s2 2s2 2p²

• Carbon can give up the outermost 2p electron also.

• Nitrogen N (7) = 1s2 2s2 2p^{3^​}

• Nitrogen has a stable half-filled electronic configuration and thus it will resist giving up that electron.

• Oxygen O (8) = 1s² 2s² 2p⁴

• Oxygen has 4 electrons on its outermost shell and the removal of one electron will give it a stable half-filled configuration.

• It will give up this electron readily.

Additional Information

• The second I.P value is the energy required to remove the second electron after the removal of 1^st electron.
• Generally, the 2^nd I.P values are larger than the 1^st I.P values. because it requires the removal of electrons from a cation.
• Oxygen after removal of 1^st electron attains a stable half-filled electronic configuration and thus removal of 2^nd electron is more difficult now. So, the 2^nd I.P of oxygen is greater than the 2^nd I.P of N**.**
• Third IP values are even larger than 2^nd IP values.

The correct answer Lakhimpur Kheri.

Key Points

• Dudhwa National Park is situated on the Indo-Nepal border in the Lakhimpur Kheri District of Uttar Pradesh.
• It is in the sub-Himalayan Region known as Tarai Belt.
• Year of Establishment- 1 Feb 1977
• Dudhwa National Park is known as the first National Park of the state after the formation of Uttrakhand.
• It is home to a large number of rare and endangered species which include Tiger, Leopard Cat, Slath beer, Rhinoceros (One horn), Hispid hare, Elephants, Black deer& Swamp deer.
• Dudhwa National Park is a stronghold of the barasingha. Around half of the world's barasinghas are present in Dudhwa National Park.

Concept:

• Growth hormone is released into the bloodstream from the anterior pituitary gland.
• The pituitary gland also produces other hormones that have different functions from growth hormone.
• Growth hormone is produced by the pituitary gland.
• It has many functions including maintaining normal body structure and metabolism.
• It is a small pea-sized gland that plays a major role in regulating vital body functions.
• It is also referred to as the 'master gland' of the human body as it controls the activity of most of the other hormone-secreting glands.

Important Points

Pineal gland:

• The Pineal gland is situated in the middle of the human brain and it is the major site of the body's Melatonin production which is usually secreted in the darkness and thus is sometimes referred to as the “Dracula of hormones”.
• Melatonin is a hormone that regulates the sleep-wake cycle. It is sometimes consumed from external sources by mouth to adjust the body's internal clock, as well as its external supplements, are commonly used for insomnia and improving sleep in different conditions.

Hypothalamus:

• To maintain homeostasis, the hypothalamus is responsible for creating or controlling many hormones in the body. The hypothalamus works with the pituitary gland, which makes and sends other important hormones around the body.

Adrenal gland:

• Adrenaline hormone is secreted by the adrenal glands in the centre of the medulla.
• The main function of adrenaline is to produce contraction of the spleen so as to store the blood, increase heartbeat and sweating, reducing the blood clotting period, and pupillary dilation.

The correct answer is 3600 Joule.

Key Points

• Power: Rate of doing work.
• ​ie. P = \(w\over t\)
• The SI units of:
• Power (P) is Watt
• Work done (W) is Joule
• Time (t) is second

Calculation

1. Hence, 1 Watt = 1Joule per second
2. Or, 1 Watt second = 1 Joule
3. But, 1 Watt-hour = 1 Watt * 3600 seconds (1 hour has 3600 seconds)
4. Hence, 1 Watt-hour = 3600 Watt seconds.
5. or,  1 Watt-hour  = 3600 Joules

Hence 3600 Joule is the correct answer.

The correct answer is Virus.

Key Points

• Hepatitis A is a disease caused by the virus.
• The hepatitis A virus (HAV) is spread through ingesting tainted food or drinking tainted water, or by coming into close contact with an infected person.
• Hepatitis A does not cause chronic liver disease.
• Chronic liver disease is caused by hepatitis B and C.
• Hepatitis A is very contagious.
• Hepatitis A vaccine is a vaccine that prevents hepatitis A.

Additional Information

• Diseases that are spread to people through mosquito bites:
• Zika virus.
• West Nile virus.
• Chikungunya virus.
• Dengue.
• Important diseases caused by bacteria are:
• Tuberculosis.
• Anthrax.
• Tetanus.
• Leptospirosis.
• Pneumonia.
• Cholera.
• Important diseases caused by protozoa are:
• Leishmaniasis.
• Amoebiasis.
• Diarrhoea.
• Trypanosomiasis.
• Toxoplasmosis.

When a body moves on a plane, then the motion is called two - dimensional motion. The motion of a planet around the sun is the example of two - dimensional motion.

The correct answer is Sulphuric Acid.

Important Points

• Sulphuric acid is an oily liquid that is viscous in nature. It is soluble in water and is a component of acid rain. The chemical formula of this compound is H2SO4.
• ​Because the basic reactions in the battery involve uptake and release of sulphuric acid molecules, an electrolyte of sulphuric acid is used in these Car-batteries.
• ​Acetic acid (CH3COOH), also called ethanoic acid, the most important of the carboxylic acids.
• Industrially, acetic acid is used in the preparation of metal acetates, used in some printing processes; vinyl acetate, employed in the production of plastics; cellulose acetate, used in making photographic films and textiles; and volatile organic esters (such as ethyl and butyl acetates), widely used as solvents for resins, paints, and lacquers.
• Nitric acid is used in the production of ammonium nitrate and calcium ammonium nitrate which find applications as fertilizers. Ammonium nitrate is also used in the manufacturing of urea ammonium nitrate (UAN) used in fertilizer formulations and also as explosives.
• Hydrochloric acid also known as muriatic acid, is a poisonous, corrosive hazardous liquid that reacts with most metals to form explosive hydrogen gas and causes severe burns and irritation of eyes and mucous membranes.
• Our stomachs make this chemical naturally which further helps in the digestion of food. Hydrochloric acid acidifies the stomach contents.
• This acid is also found primarily in several industries like rubber, textiles, and even in photography.

Amongst seven girls Aanya, Bira, Cleo, Diana, Elle, Fathima and Georgia, each has a different age.

1) Bira is younger than only Georgia.

Georgia > Bira

2) Diana is older than four other girls.

Georgia > Bira > Diana >___> ___> ___> ___.

3) Fathima is elder than only Cleo and Aanya is younger than Elle.

Georgia > Bira > Diana > Elle > Aanya > Fathima > Cleo.

∴ Here, 'Elle' is the fourth eldest among the girls

Hence, the correct answer is "Elle".

Given: 36 people are standing in a straight row facing the north.

1. Aman is standing 11^th from the left end.

2. Pratha is standing 12^th from the right end.

So, the number of people standing between Aman and Pratha:

= Total people - (Position of Aman from left + Position of Pratha from right)

= 36 - (11 + 12)

= 36 - 23 = 13.

So, there are '13' people standing between Aman and Pratha.

Hence, the correct answer is "Option 4".

Option(4) is correct.

Option1: See if there is any way you can deny giving the information: No, if the information comes under the RTI act(by the Government of India) then we need to give the information. 

Option2: Give only partial information hiding details that reflect poorly on your office: No, we need to provide the full information regarding RTI being filed as per RTI ACT.

Option3: Try to informally contact the person and ask him to take back the query: No, according to the RTI act we need to give the required information if it comes under RTI query.

Option4: Promptly give the appropriate information sought in the RTI query: Yes, we need to give information within the specified time defined in the RTI act.

Hence the correct answer is an option(4) i.e., Promptly give the appropriate information sought in the RTI query.

The correct answer is Option 3: Flatly refuse the job offer and try in another company.

• Qualities Projected in this situation:  (Effective Intelligence, Self-confidence, Courage, Presence of mind, and Speed of decision making).

Key Points

• Checklist for attempting SRT questions:

1. Read the question and options carefully.
2. Look for options that are realistic, optimistic, and reflect officer-like qualities.
3. Do not skip any situation.
4. Relegate the negative sentences and choose the most logical option among the remaining. As time is an important factor, hence your thinking ability should be swift.
5. React quickly and be logical.

Additional Information

Officer qualities:

The logic applied for the given input is:

1) Arrange numbers in ascending order.

2) Words in alphabetical order

Input: apple 12 orange 7 banana 15

Step 1: 7 apple 12 orange banana 15

Step 2: 7 apple 12 banana orange  15

Step 3: 7 apple 12 banana 15 orange

Thus, Step 2 is → 7 apple 12 banana 15 orange

Hence, the correct answer is "Option 2".

The logic followed here is:

Given number: 9345712.

Odd digits is decreased by - 1

and, Even digits is increased by + 2

After arrange the numbers:

9345712 ⇒ 8264604

Now, The largest digits after rearranging the series: 8

And, The smallest digits after rearranging the series: 0

So, the difference between the largest and smallest digits is: 8 - 0 = 8.

Hence, the correct answer is "Option 2".

Statement:

I. All leopards are cheetahs.

II. No cheetah is a cat.

The least possible diagram for the given statements is as follows:

Conclusions:

(i) Some cats are leopards - False (Because No definite relation given between them, so it can be possible only).

(ii) Some cats are cheetahs - False (Because No cheetah is a cat).

Here, Neither conclusion I nor II follows.

Hence, the correct answer is "Option 2".

Conclusion I:

I. Egypt, during the Pharaohs, had an uneven distribution of National Income.

Since the statement is compared to the historic scenario of uneven distribution of national Income during the Egyptian Pharaohs, we can conclude that Egypt, during the Pharaohs, had an uneven distribution of national income.

Therefore, Conclusion I follows.

Conclusion II: India currently has an unequal distribution of National Income.

The fact that in the statement it is clearly mentioned that a high amount of National Income is held by the top 10 richest persons in India. 

Therefore, Conclusion II follows.

Hence, the correct answer is "Both the conclusions follow".

For every mirror image based on a clock,

If it is a 12 hours clock, then subtract the given time from 11:60 hrs.

And if it is a 24 hr clock, then subtract the given time from 23:60 hrs.

Here, it is a 12 - hr analog clock, hence, 11:60 – 5:00 = 6:60 I.e. 7:00

Hence, the mirror image time will be 7’O clock.

Hence, 7:00 is the correct answer.

Additional Information

• Real time + Water image time = 18 : 30 (If the water image time is 6 more than the imaginary time).
• If the imagery time in water image time is less than 6, then the given imagery time is subtracted to 6:30.

6 is code for "happy".

4 is code for "sad".

Hence, the code for "and" is 9.

The logic followed here is :-

Hence, the correct answer is "ACGM".

The logic followed here is :

The figure is vertically flipped and each flip reduced one ring in the embedded spring.

1. Pattern of Star: In each consecutive circle, the star is moving vertically upwards and downwards. Thus, in the following circle the star will be placed at downward. 

2. Pattern of Spring: In each consecutive circle, the rings in spring reduce by one. Thus, in the following circle, the number of rings will be 6 in the spring. 

so the next figure will be,

Hence, 'Option 3' is the correct answer.

Logic applied for the input:

Apple 41 Orange 62 85 Mango Banana 19

The rearrangement rule is to move the "alphabetically smallest word" to the leftmost side and the "numerically largest number" to the rightmost side in each step.

This process continues until all words are at the left, sorted alphabetically, and all numbers are at the right, sorted in descending order.

Input: Apple 41 Orange 62 85 Mango Banana 19

Step 1: Find the alphabetically smallest word (Apple) and the numerically largest number (85).

Apple Banana 41 Orange 62 Mango 19 85

Step 2: Find the next smallest word (Banana) and the next largest number (62).

Apple Banana 41 Orange Mango 19 85 62

Step 3: Find the next smallest word (Mango) and the next largest number (41).

Apple Banana Mango Orange 19 62 85 41

Step 4: Find the last word (Orange) and the last number (19).

Apple Banana Mango Orange 62 85 41 19 

The final arrangement, with all words arranged in alphabetical order at the left end, and all numbers in descending order at the right end, is "Apple Banana Mango Orange 62 85 41 19".

Hence, the correct answer is "Option 1".

The logic followed here is:

Option 1) TJ

Option 2) VK

Option 3) QD

Option 4) LF

Here, 'QD' is odd among the given options.

Hence, the correct answer is "Option 3".

Given: 13^th February of the month = Thursday. (As, 29 days month is February)

So, second last day of the month means 28^th February,

And, days between 13^th February to 28^th February - 15 days.

And, 15 days = 15/7 = 2 week and 1 odd day.

Then, the second last day of the month will be: Thursday + 1 = Friday.

Hence, the correct answer is "Option 1".

The correct answer is "option 4".

Qualities projected in this situation: ( Cooperation, Effective Intelligence, Initiative, and Social Adaptability)

Key Points Checklist for attempting SRT Questions:

1. Read the question and options carefully

2. Look for an option that is optimistic, realistic, and reflects officer-like qualities.

3. Do not skip any questions.

4. Relegate the negative sentences and choose the most logical option among the remaining. As time is an important factor, your thinking ability should be swift.

5. Read quickly and be logical.

Additional Information

Decoding signs:

Given: 70 × 2 – 4 ÷ 60 + 150 = ? 

70 × 2 – 4 ÷ 60 + 150 = ? ⇒ 70 ÷ 2 × 4 + 60 – 150 = ?

⇒ 70 ÷ 2 × 4 + 60 – 150 = ?

⇒ 35 × 4 + 60 – 150 = ?

⇒ 140 + 60 – 150 = ?

⇒ 200 – 150 = ?

⇒ 50 = ?

Hence, "Option 3" is the correct answer.

The correct answer is Option 3: will request the flat owner to give some more time to arrange the accommodation.

• Qualities Projected in this situation:  (Effective Intelligence, Sense of responsibility, Organizing ability, and Speed of decision making).

Key Points

• Checklist for attempting SRT questions:

1. Read the question and options carefully.
2. Look for options that are realistic, optimistic, and reflect officer-like qualities.
3. Do not skip any situation.
4. Relegate the negative sentences and choose the most logical option among the remaining. As time is an important factor, hence your thinking ability should be swift.
5. React quickly and be logical.

Additional Information

Officer qualities:

The pattern followed here is:

Hence, the next term in the series is ‘216’.

letters that are immediately preceded by a letter and immediately followed by a symbol are shown as follows:

Thus, there are five such pairs:

1. C N ^
2. Y T %
3. H K &
4. EG ^
5. RI&

But we have to find Consonants - Consonants - Symbol

1. C N ^
2. Y T %
3. H K &

Hence, the correct answer is Option (4).

• The correct answer is Option 1: dive into the river to save him.

• Qualities Projected in this situation:  (Initiative, Effective Intelligence, Courage, and Speed of decision)

Key Points

• Checklist for attempting SRT questions:

1. Read the question and options carefully.
2. Look for options that are realistic, optimistic, and reflect officer-like qualities.
3. Do not skip any situation.
4. Relegate the negative sentences and choose the most logical option among the remaining. As time is an important factor, hence your thinking ability should be swift.
5. React quickly and be logical.

Additional Information

Officer qualities:

If we observe the diagram:

We see that the rectangular box’s mirror image is present in the 2^nd part, so in the missing image, 3^rd box’s mirror image will be present.

With this criterion, option 4^th is eliminated.

Next, the arrow which is filled with colour is facing south in 1^st box and north in 3^rd box. Following the same pattern, the arrow that is filled with colour is facing east in 2^nd box, so definitely the arrow in 4^th box will be facing west.

Only option 1 and 2 satisfies this condition.

But if we see the position of arrow, in 1^st and 3^rd box, the position of the arrows is same, just the direction they are facing is opposite to each other.

So, in option 1, the position of the arrow is same as the position of the arrow in box 2.

Hence, option 1 will come next in the following figure series.

The positions of the letters according to the English alphabet series:

The pattern for this code is as follows;

1^st, 3^rd and 5^th letter is replaced by +2 and 2^nd, 4^th and 6^th letter is replaced by reverse letter.

Similarly;

Hence, "CXVFCO" is the correct answer.

Shortcut Trick

Shortcut to remember the reverse positional letters.

The pattern followed here is: 

Code = opposite letter

Similarly, 

Hence, the correct answer will be WFHGNRGV.

The logic follows here is:

Given, on 1^st January 2006 it was Sunday.

Then, on 31^st December, 2005 it was Saturday.

Number of odd days from the year 2006 to the year 2009 = (1 + 1 + 2 + 1) = 5 days.

31 December 2005 + 5 = Thursday

∴ On 31^st December 2009, it was Thursday.

Thus, on 1^st January, 2010 it was Friday.

Hence, the correct answer is "Friday".

Additional Information

Year - One year has 365 days or 366 days on this basis the year is divided into two parts:

• Normal year - It has 365 days.
• Leap year - It has 366 days and completely divisible by 4.

Century leap year - The year which is exactly divisible by 400. Example - 1200, 1600, 2000 etc.

Counting of Odd days

Ordinary Year: 365 days (52 weeks + 1 days)

= 1 Odd days

Leap Year: 366 days (52 weeks + 2 days)

= 2 Odd day

In an ordinary year, there are 365 days and on dividing 365 by 7,

we get remainder = 1 so this extra one day is taken as an odd day.

Similarly, in a leap year, there are 366 days and on dividing 366 by 7,

we get remainder = 2 so these extra days are taken as the odd days.

Thus, the remainder, which we get after dividing the number of days by 7 is considered as odd days.

The logic followed here is :-

Cricket is played on pitch.

Similarly,

Golf is played on course.

Hence, the correct answer is "Course".

From the given information:

Step 1: Only three persons sit between M2 and M3. M3 is sitting to the immediate left of M5. 

Step 2: Only three persons sit between M1 and M5.

Step 3: M4 sits to the immediate left of M6 and is to the right of M3.

From the diagram we can see, there are two people between M3 and M6.

Hence, the correct answer is option 4).

According to the given information the figure is shown below,

On analyzing the above figure we get the person travelled 40 km Southward and 40 km Northward, so the northward and southward distance cancelled out. The person has travelled 25 Km (20 Km + 5 Km) eastward.

Hence, the shortest distance between her bank and her house is 25 Km.

Here the logic is:

All lines are moving in 1 step upward direction and in each step one new line is added with one new symbol.

Hence, ‘option 3’ is the correct answer.

The figure that will replace the question mark (?) in the following figure series is shown below:

1. In given figure 2 tringles is here both tringles change shadow part to white part and white part to shadow.

2. In given figure 3 box here, and every box has one shape this shape change here position.

Similarly, 

Hence, ‘option 4’ is the correct answer.

The logic followed here is :-

• Elements from left up corner to right below corner are shifting anti-clockwise diagonally.
• Elements from left below corner exchanged positions with right up corner element.

​So,

• Figures A and B ⇒

​

Similarly,

• Figure C and D ⇒

​

Thus, final pattern is :

Hence, "Option - (2)" is the correct answer.

We used the following symbols for family tree,

Family tree:

As we can see Kavita is granddaughter of Jagdish.

Preparing the family tree diagram by using the following symbols:

According to the

Statement:

This girl is the wife of my mother's grandson.

Here,  that girl is daughter in law to gaurav as per the diagram.

Hence, the correct answer is "Daughter in law".

According to the given information,

Assumption 1: This is implicit, as when a children cry means they wanted to say something which they are unable to say.

Assumption 2: This is also implicit, because parents leave them to play by themselves and when they cry parent need to see them.

Hence, “both 1 and 2” are implicit.

From the given information,

Either both or none of the parents are alive implies there is no single parent in the family.

1. D is the maternal grandmother of E whose gender is the same as that of B.

2) A is the son-in-law of B.

3) D has only two children, F and C. 

4) A is the spouse of F.

Since the gender of C is not known, the relation of C with E cannot be determined.

Hence, the relation of C with E cannot be determined.

In Δ ABC, ∠BPC = 102°

Formula used:

∠BPC = 90° + ∠A/2 (Angle made by bisector)

Calculation:

Therefore, ∠BPC = 90° + ∠A/2

⇒ 102° = 90° + ∠A/2

⇒ ∠A/2 = 102° - 90°

⇒ ∠A/2 = 12°

⇒ ∠A = 2 × 12° = 24°

∴​ The value of ∠A is 24°

Shortcut Trick

Let speed of boat be v. Total time = 2 hours 32 minutes = 2 + 32/60 = 38/15 hours.

Equation: 20/(v − 5) + 30/(v + 5) = 38/15.

Test options: If v = 20, then 20/15 + 30/25 = 4/3 + 6/5 = (20 + 18)/15 = 38/15.

The condition is satisfied when v = 20 km/h.

∴ The correct answer is 20 km/h.

Alternate Method

Given: Upstream distance = 20 km, Downstream distance = 30 km, Stream speed (s) = 5 km/h, Total time = 2 hours 32 mins.

Formula: Time = Distance ÷ Speed | Upstream Speed = v − s | Downstream Speed = v + s

⇒ Total Time = 2 + 32/60 = 2 + 8/15 = 38/15 hours

⇒ 20/(v − 5) + 30/(v + 5) = 38/15

⇒ [20(v + 5) + 30(v − 5)] / (v² − 25) = 38/15

⇒ [20v + 100 + 30v − 150] / (v² − 25) = 38/15

⇒ (50v − 50) / (v² − 25) = 38/15

⇒ 15(50v − 50) = 38(v² − 25)

⇒ 750v − 750 = 38v² − 950

⇒ 38v² − 750v − 200 = 0

⇒ 19v² − 375v − 100 = 0

⇒ 19v² − 380v + 5v − 100 = 0

⇒ 19v(v − 20) + 5(v − 20) = 0

⇒ (19v + 5)(v − 20) = 0

⇒ v = 20 (Speed cannot be negative)

∴ The correct answer is 20 km/h.

Additional Information

Relative Speed in Water

Downstream speed is the sum of boat speed and stream speed (v + s), while upstream speed is the difference (v − s).

Average Speed for Round Trip

If distances are equal, Average Speed = (Upstream × Downstream) / Boat Speed in still water.

Speed of Boat and Stream

Boat Speed (v) = (Downstream + Upstream) / 2 and Stream Speed (s) = (Downstream − Upstream) / 2.

Ascending order of the following data,

⇒ 25, 29, 30, 32, 33, 33, 42, 42, 42, 45, 46, 47, 48, 51, 52, 53, 54, 60, 65, 72

Total number of values = 20

10^th data = 45 and 11^th data = 46

⇒ Median = (45 + 46)/2 = 45.5

42 occurred 3 times,

⇒ Mode of the following data = 42

∴ The difference of median and mode of the following data = (45.5 – 42) = 3.5

Given:

Population = 18000

Current Population = 15000

Solution:

Total decrease in population = 18000 - 15000 = 3000

Decrease% = 3000/18000 × 100

Decrease% = 16.66%

The answer is 16.66%.

Shortcut Trick

Assume a base average of 42.

Deviation for 8 people = 81 − 42 = +39 per person.

Total deviation = 8 × 39 = 312.

Distribute deviation among all (5 + 8 = 13) people: 312 ÷ 13 = 24.

New Average = 42 + 24 = 66 years.

∴ The correct answer is 66 years.

Alternate Method

Given:

Number of people in Group 1 (n₁) = 5, Average (A₁) = 42 years.

Number of people in Group 2 (n₂) = 8, Average (A₂) = 81 years.

Formula Used:

Combined Average = (n₁A₁ + n₂A₂) ÷ (n₁ + n₂)

Calculations:

⇒ Total age of Group 1 = 5 × 42 = 210 years

⇒ Total age of Group 2 = 8 × 81 = 648 years

⇒ Total age of all people = 210 + 648 = 858 years

⇒ Total number of people = 5 + 8 = 13

⇒ Combined Average = 858 ÷ 13

⇒ Combined Average = 66 years

∴ The correct answer is 66 years.

Additional Information

Weighted Average

When groups of different sizes are combined, the average is the sum of all values divided by the total count: A_w = Σ(n_ix_i) / Σn_i.

Deviation Method

New Average = Assumed Average + (Total Deviation ÷ Total Number of Observations).

Alligation Rule

The ratio of the number of items in two groups is inversely proportional to the difference between their individual averages and the combined average.