he average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 60 kg. What might be the weight of the new person ? Answers:
A) 75 kg	B) 55 kg	C) 80 kg	D) 85 kg	E) 25 kg

Rationale: "explanation : total weight increased = ( 8 x 2.5 ) kg = 20 kg . weight of new person = ( 60 + 20 ) kg = 80 kg . answer : c"
Answer: C