The average weight of 8 person's increases by 6 kg when a new person comes in place of one of them weighing 40 kg. What might be the weight of the new person? Options.
A) 80 kg B) 85 kg C) 90 kg D) 88 kg E) 110 kg

Rationale: "total weight increased = ( 8 x 6 ) kg = 48 kg . weight of new person = ( 40 + 48 ) kg = 88 kg . answer : d"
Answer: D