Question

There are 2 division A and B of a class consisting of 36 and 44 students the average weight of student in division A is 40 kg and that of in division b is 35 kg what is the average weight of whole class e

Answer 1

 it will be 36+44=80 and the average of weight =1440+1540=2980
 hence average weight of whole class will be 2980/80 or199/2=99.5 ans