The average weight of 8 persons is increased by 2.5 kg when a new person comes in place of one of them who weighs 56 kg is replaced by a new man. The weight of the new man is?

A) 76 kg

B) 72 kg

C) 78kg

D) None of these

Solution:

Total number of person = 8

Increased in average weight = 2.5 kg

Total weight increased = 8 x 2.5 = 20 kg

Weight of replaced person = 56 kg

Weight of new person = ( 56 + 20 ) =76 Kg