Correct option is B
Given:
Number of boys = 40
Average weight of boys = 33 kg
Number of remaining students = 72 - 40 = 32
Average weight of remaining students = 15 kg
Formula Used:
Average weight of all students =
Solution:
Total weight of boys = 40 × 33
Total weight of boys = 1320 kg
Total weight of remaining students = 32 × 15
Total weight of remaining students = 480 kg
Total weight of all students = 1320 + 480
Total weight of all students = 1800 kg
Total number of students = 72
Average weight of all students = Total weight of all students / Total number of students
=> Average weight of all students = 1800 / 72
=> Average weight of all students = 25 kg
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