PSLE The ratio of the number of blouses to that of jackets in a boutique was 10 : 9 in the end. After 51 jackets were sold, the ratio of the number of blouses to that of jackets became 3 : 1. What was the total number of blouses and jackets in the boutique in the end?
|
Blouses |
Jackets |
Total |
Before |
10x3 = 30 u |
9x3 = 27 u |
57 u |
Change |
|
- 51 |
|
After |
3x10 = 30 u |
1x10 = 10 u |
40 u |
The number of blouses remains unchanged. Make the number of blouses the same.
LCM of 3 and 10 is 30.
Number of jackets sold
= 27 u - 10 u
= 17 u
1 u = 51 ÷ 17 = 3
Total number of blouses and jackets in the end
= 30 u + 10 u
= 40 u
= 40 x 3
= 120
Answer(s): 120