Question

the mean weight of 60 student of a class is 52.75 kg the mean weight of 25 student of this class is 51 kg find the mean weight of the remaining certified students of the class

Answer 1

mean of weight of 60 students=52.75
sum of weight of 60 students=3165
mean of weight of 25 students=51
sum of weight of 25 students=1275
remaining students=35
sum of weight of 35 students=1890
mean of weight of 35 students=1890/35
=54