Question

The average weight of 8 persons is increased by 2.5 kg when one of
them who weighs 56 kg is replaced by a new man. The weight of the
new man is
1) 73 kg
2) 72 kg 3) 75 kg 4) 80 kg 5) None of these​

Answer 1

Answer:

Total weight increased = (8 x 2.5) kg = 20 kg. Weight of new person = (65 + 20) kg = 85 kg. Average increases by 2.5 kgs.. this means that total increase in weight is 8 × 2.5 = 20 kgs..