The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 45kg. What is the weight of the new person? Select:	A) 75 kg	B) 65 kg	C) 85 kg	D) 80 kg	E) 60 kg

Rationale: "explanation : total increase in weight = 8 ã — 2.5 = 20 if x is the weight of the new person , total increase in weight = x â ˆ ’ 45 = > 20 = x - 45 = > x = 20 + 45 = 65 answer : option b"
Answer: B