Question

The mean weight of 60 students of a class is 52 . 72 kg . If the mean weight of 35 of them is 54 kg find the mean weight of the remaining students ?

Answer 1

Answer:

1. total weight of 60 students = 60×avg wt= 60× 52.72= 3163.2kg
2. total weight of 35= 35×54=1890kg
3. so total weight of remaining 25 students = 3163.2-1890=1273.2kg
4. so mean weightof remaining 25=total weight of 25/25= 1273.2/25= 50.928kg