The average weight of 4 men is increased by 3 kg when one of them, whose weight is 80 kg, is replaced by another man. What is the weight of the new man?

What is the average number of students in B.Tech (220), M.Tech (140), and B.A (4344) courses together?

A class has two sections A and B, which have 36 and 44 students respectively. If the average weight of section A is 40 kg and that of section B is 35 kg, find the average weight of the whole class.