The number of stamps that P and Q had were in the ratio of 7:3 respectively.
The number of stamps that P and Q had were in the ratio of 7:3 respectively. After P gave Q 13 stamps, the ratio of the number of P's stamps to the number of Q's stamps was 5:4. As a result of the gift, P had how many more stamps than Q?
Answer/Solution
10
Steps/Work
P started with 7k stamps and Q started with 3k stamps.
(7k-13)/(3k+13) = 5/4
28k - 15k = 117
k = 9
P has 7(9) - 13 = 50 stamps and Q has 3(9)+13 = 40 stamps.
The answer is A.
(7k-13)/(3k+13) = 5/4
28k - 15k = 117
k = 9
P has 7(9) - 13 = 50 stamps and Q has 3(9)+13 = 40 stamps.
The answer is A.