The number of stamps that P and Q had were in the ratio of 7:2 respectively. After P gave Q 15 stamps, the ratio of the number of P's stamps to the number of Q's stamps was 2:1. As a result of the gift, P had how many more stamps than Q?  Pick.
A) 25	B) 35	C) 45	D) 55	E) 65
P started with 7k stamps and Q started with 2k stamps.   (7k-15)/(2k+15) = 2/1   3k = 45   k = 15   P has 7(15) - 15 = 90 stamps and Q has 2(15)+15 = 45 stamps.   The answer is 45.
<result>C</result>
The number of stamps that P and Q had were in the ratio of 7:2 respectively. After P gave Q 15 stamps, the ratio of the number of P's stamps to the number of Q's stamps was 2:1. As a result of the gift, P had how many more stamps than Q?