PSLE The ratio of the number of skirts to that of coats in a factory outlet was 5 : 4 in the end. After 32 coats were sold, the ratio of the number of skirts to that of coats became 11 : 8. What was the total number of skirts and coats in the factory outlet in the end?
|
Skirts |
Coats |
Total |
Before |
5x11 = 55 u |
4x11 = 44 u |
99 u |
Change |
|
- 32 |
|
After |
11x5 = 55 u |
8x5 = 40 u |
95 u |
The number of skirts remains unchanged. Make the number of skirts the same.
LCM of 11 and 5 is 55.
Number of coats sold
= 44 u - 40 u
= 4 u
1 u = 32 ÷ 4 = 8
Total number of skirts and coats in the end
= 55 u + 40 u
= 95 u
= 95 x 8
= 760
Answer(s): 760