Seven friends spent Rs. 16 each on a project and the eighth friend spent Rs. 35 more than the average expenditure of all eight of them. What is the total money spent by them?
- AOption (a)
Rs. 168
- BOption (b)
Rs. 148
- COption (c)
Rs. 176
- DOption (d)
Rs. 160
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Correct answer
Rs. 168
Why this answer is correct
Concept used
Average
Calculation
Let the average expenditure of all eight friends be Rs. x
Seven friends spend Rs.16
Sum = 16 × 7 = Rs.112
As per the question
⇒ ( 112 + x + 35)/8 = x
⇒ x + 147 = 8x
⇒ 7x = 147
⇒ x = 21
The total amount spent by them all
⇒ 112 + (35 + 21) = Rs.168
∴ Total money spent by them is Rs. 168.