The ratio of gold to pink stamps that Jane had was 5 : 4. The cost of each of the gold stamps was $4 and the cost of each of the pink stamps was $9. Jane sold 60% of the gold stamps and the total cost of the unsold stamps was $264. How many gold stamps did she have left?
| |
Gold stamps |
Pink stamps |
| Before |
5 u |
4 u |
| Change |
- 3 u |
|
| After |
2 u |
4 u |
Number of gold stamps sold
= 60% x 5 u
=
60100 x 5 u
= 3 u
| |
Gold stamps |
Pink stamps |
Total |
| Number |
2 u |
4 u |
|
| Value |
$4 |
$9 |
|
| Total value |
8 u |
36 u |
$264 |
Total cost of unsold stamps
= 8 u + 36 u
= 44 u
44 u = 264
1 u = 264 ÷ 44 = 6
Number of gold stamps that Jane had left
= 8 u
= 8 x 6
= 48
Answer(s): 48
