What must be added to each term of the ratio 7:11, So as to make it equal to 3:4?	Choose one:
A) 8  B) 7.5  C) 6.5  D) 5  E) 6

Rationale: "solution : let x be added to each term . according to question , ( 7 + x ) / ( 11 + x ) = 3 / 4 ; or , 33 + 3 x = 28 + 4 x ; or , x = 5 . answer : option d"
Answer: D