PSLE The ratio of the number of coats to that of blazers in a factory outlet was 2 : 1 in the end. After 15 blazers were sold, the ratio of the number of coats to that of blazers became 11 : 4. What was the total number of coats and blazers in the factory outlet in the end?
|
Coats |
Blazers |
Total |
Before |
2x11 = 22 u |
1x11 = 11 u |
33 u |
Change |
|
- 15 |
|
After |
11x2 = 22 u |
4x2 = 8 u |
30 u |
The number of coats remains unchanged. Make the number of coats the same.
LCM of 11 and 2 is 22.
Number of blazers sold
= 11 u - 8 u
= 3 u
1 u = 15 ÷ 3 = 5
Total number of coats and blazers in the end
= 22 u + 8 u
= 30 u
= 30 x 5
= 150
Answer(s): 150