The ratio between the current age of A and B is 6:7. If B is 4 years old than A. What will be the ratio of the ages of A and B after 4 years?	Choose the correct choice from the following:  A) 7 : 8  B) 8 : 9  C) 4 : 6  D) 4 : 8  E) 5 : 8

Rationale: a 7 : 8 if a ’ s age and b ’ s age will be 6 a years and 7 a years correspondingly then , 7 a – 6 a = 4 a = 4 needed ratio = ( 6 a + 4 ) : ( 7 a + 4 ) = 28 : 32 = 7 : 8
Answer: A