If A and B are in the ratio 3:4, and B and C in the ratio 12:13, then A and C will be in the ratio  Choose the correct choice from the following answers:  A) 3 : 13  B) 9 : 13  C) 36 : 13  D) 13 : 9  E) none

Rationale: solution : ( a / b ) * ( b / c ) = ( 3 / 4 ) * ( 12 / 13 ) ; or , a / b = 36 / 39 = 9 : 13 . answer : option b
Answer: B