The average weight of 5 person's increases by 10.0 kg when a new person comes in place of one of them weighing 40 kg. What might be the weight of the new person? Choose the correct choice from the following answers:
A) 76 kg
B) 76.5 kg
C) 90 kg
D) data inadequate
E) none of these

Rationale: "explanation : total weight increased = ( 5 x 10.00 ) kg = 50 kg . weight of new person = ( 40 + 50 ) kg = 90 kg . answer : c"
Answer: C