The total age of A and B is 15 years more than the total age of B and C. C is how many years younger than A ?	Answers
A) 12  B) 15  C) c is elder than a  D) data inadequate  E) none

Rationale: "solution [ ( a + b ) - ( b + c ) ] = 15 â € ¹ = â € º a - c = 15 . answer b"
Answer: B