PSLE The ratio of the number of shirts to that of blazers in a factory outlet was 11 : 8 at first. After 14 blazers were sold, the ratio of the number of shirts to that of blazers became 3 : 2. What was the total number of shirts and blazers in the factory outlet at first?
|
Shirts |
Blazers |
Total |
Before |
11x3 = 33 u |
8x3 = 24 u |
57 u |
Change |
|
- 14 |
|
After |
3x11 = 33 u |
2x11 = 22 u |
55 u |
The number of shirts remains unchanged. Make the number of shirts the same.
LCM of 3 and 11 is 33.
Number of blazers sold
= 24 u - 22 u
= 2 u
1 u = 14 ÷ 2 = 7
Total number of shirts and blazers at first
= 33 u + 24 u
= 57 u
= 57 x 7
= 399
Answer(s): 399