The ratio of yellow to blue stamps that Victoria had was 5 : 4. The cost of each of the yellow stamps was $4 and the cost of each of the blue stamps was $8. Victoria sold 40% of the yellow stamps and the total cost of the unsold stamps was $352. How many blue stamps did she have left?
| |
Yellow stamps |
Blue stamps |
| Before |
5 u |
4 u |
| Change |
- 2 u |
|
| After |
3 u |
4 u |
Number of yellow stamps sold
= 40% x 5 u
=
40100 x 5 u
= 2 u
| |
Yellow stamps |
Blue stamps |
Total |
| Number |
3 u |
4 u |
|
| Value |
$4 |
$8 |
|
| Total value |
12 u |
32 u |
$352 |
Total cost of unsold stamps
= 12 u + 32 u
= 44 u
44 u = 352
1 u = 352 ÷ 44 = 8
Number of blue stamps that Victoria had left
= 32 u
= 32 x 8
= 256
Answer(s): 256
