The average weight of 5 persons increases by 1.5 kg. If a person weighing 65 kg is replaced by a new person, what could be the weight of the new person?
Pick
A) 76 kg  B) 77 kg  C) 72.5 kg  D) data inadequate  E) none of these

Rationale: "total weight increases = 5 × 1.5 = 7.5 kg so the weight of new person = 65 + 7.5 = 72.5 kg answer c"
Answer: C