The average weight of 4 men increases by 3 kg when one of them, who weighs 120 kg, is replaced by another man. What is the weight of the new man?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 132 kg
The number of men stays 4, so a rise of 3 kg in the average means the total weight rises by \(4\times3\) kg. The whole rise comes from the new man being heavier than the man he replaces.
Rise in the total weight \(=4\times3=12\) kg
Weight of the new man \(=120+12=132\) kg
The new man weighs 132 kg.