PSLE The ratio of the number of blouses to that of shirts in a shop was 4 : 3 at first. After 49 shirts were sold, the ratio of the number of blouses to that of shirts became 5 : 2. What was the total number of blouses and shirts in the shop at first?
|
Blouses |
Shirts |
Total |
Before |
4x5 = 20 u |
3x5 = 15 u |
35 u |
Change |
|
- 49 |
|
After |
5x4 = 20 u |
2x4 = 8 u |
28 u |
The number of blouses remains unchanged.
Make the number of blouses the same.
LCM of 3 and 4 is 20.
Number of shirts sold
= 15 u - 8 u
= 7 u
1 u = 49 ÷ 7 = 7
Total number of blouses and shirts at first
= 20 u + 15 u
= 35 u
= 35 x 7
= 245
Answer(s): 245