PSLE The ratio of the number of blazers to that of jackets in a shop was 7 : 5 at first. After 24 jackets were sold, the ratio of the number of blazers to that of jackets became 2 : 1. What was the total number of blazers and jackets in the shop at first?
|
Blazers |
Jackets |
Total |
Before |
7x2 = 14 u |
5x2 = 10 u |
24 u |
Change |
|
- 24 |
|
After |
2x7 = 14 u |
1x7 = 7 u |
21 u |
The number of blazers remains unchanged. Make the number of blazers the same.
LCM of 2 and 7 is 14.
Number of jackets sold
= 10 u - 7 u
= 3 u
1 u = 24 ÷ 3 = 8
Total number of blazers and jackets at first
= 14 u + 10 u
= 24 u
= 24 x 8
= 192
Answer(s): 192