PSLE The ratio of the number of blouses to that of vests in a boutique was 5 : 3 in the end. After 16 vests were sold, the ratio of the number of blouses to that of vests became 3 : 1. What was the total number of blouses and vests in the boutique in the end?
|
Blouses |
Vests |
Total |
Before |
5x3 = 15 u |
3x3 = 9 u |
24 u |
Change |
|
- 16 |
|
After |
3x5 = 15 u |
1x5 = 5 u |
20 u |
The number of blouses remains unchanged.
Make the number of blouses the same.
LCM of 3 and 5 is 15.
Number of vests sold
= 9 u - 5 u
= 4 u
1 u = 16 ÷ 4 = 4
Total number of blouses and vests in the end
= 15 u + 5 u
= 20 u
= 20 x 4
= 80
Answer(s): 80