The average weight of a group of eight people increased by 2.5 kg when a person weighing 80 kg joined in place of one of the members of the group. The weight of the member replaced was:
Answer & explanation
Correct answer: option 1
Total Increment in weight = 8 × 2.5 = 20 kg
Weight of old man = weight of new man - 20
Weight of old man = 80 - 20 = 60 kg