The ages of X and Y are in the ratio 4 : 7. Three years earlier, the ratio of their ages was 1 : 2. What is the difference between their current ages (Y - X)?

The ages of X and Y are in the ratio 4 : 7. Three years earlier, the r

1.	The ages of X and Y are in the ratio 4 : 7. Three years earlier, the ratio of their ages was 1 : 2. What is the difference between their current ages (Y - X)?
A.	3
B.	6
C.	9
D.	7.5
Answer» D. 7.5