Question

The average weight of 25 students of section A of a class is 51 kg whereas average weight of 35 student of section B is 54kg.find the average weight of 60 students of this class.

Answer 1

Average weight of 25 students =51kg
sum of weights=51 x 25 =1275
Average weight of 35 students =54kg
sum of weights=35 x 54 = 1890
total sum of weights=1275 +1890=3165
Average of weights of 60 students=3165/60=52.75