PSLE The ratio of the number of blouses to that of shirts in a factory outlet was 11 : 9 in the end. After 12 shirts were sold, the ratio of the number of blouses to that of shirts became 4 : 3. What was the total number of blouses and shirts in the factory outlet in the end?
|
Blouses |
Shirts |
Total |
Before |
11x4 = 44 u |
9x4 = 36 u |
80 u |
Change |
|
- 12 |
|
After |
4x11 = 44 u |
3x11 = 33 u |
77 u |
The number of blouses remains unchanged. Make the number of blouses the same.
LCM of 4 and 11 is 44.
Number of shirts sold
= 36 u - 33 u
= 3 u
1 u = 12 ÷ 3 = 4
Total number of blouses and shirts in the end
= 44 u + 33 u
= 77 u
= 77 x 4
= 308
Answer(s): 308