The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?	Choose the correct option:
A) 76 kg	B) 76.5 kg	C) 85 kg	D) 90 kg	E) none

Rationale: "sol . total weight increased = ( 8 × 2.5 ) kg = 20 kg . weight of new person = ( 65 + 20 ) kg = 85 kg . answer c"
Answer: C