If the average marks of three batches of 40, 50 and 60 students, respectively, is 50, 60 and 75, then the average marks of all the students is:
- ((a))
70.00
- ((b))
65.50
- ((c))
63.33
- ((d))
61.25
Show Answer
63.33
Given:
Batch 1: 40 students with average marks = 50
Batch 2: 50 students with average marks = 60
Batch 3: 60 students with average marks = 75
Formula Used:
Average marks of all students = (Total marks of all students) / (Total number of students)
Calculation:
Total marks of Batch 1 = 40 × 50 = 2000
Total marks of Batch 2 = 50 × 60 = 3000
Total marks of Batch 3 = 60 × 75 = 4500
Total marks of all students = 2000 + 3000 + 4500 = 9500
Total number of students = 40 + 50 + 60 = 150
Average marks of all students = 9500 / 150
Average marks of all students = 63.33
The average marks of all the students is 63.33.






























































