The total age of A and B is 12 years more than the total age of B and C. C is how many year younger than A? Choose one.
A) 10
B) 11
C) 12
D) 13
E) 15
Given that, A + B =12+ B + 12   ⇒ A - 12 =12   Therefore, 12 is younger than A by 12 years   Answer is 12.
<result>C</result>
The total age of A and B is 12 years more than the total age of B and C. C is how many year younger than A?