The average weight of 6 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?
Choices
A) 74 kg
B) 77 kg
C) 76.5 kg
D) data inadequate
E) none of these

Rationale: "total weight increases = 6 × 1.5 = 9 kg so the weight of new person = 65 + 9 = 74 kg answer a"
Answer: A