PSLE The ratio of the number of jackets to that of coats in a factory outlet was 5 : 3 in the end. After 18 coats were sold, the ratio of the number of jackets to that of coats became 8 : 3. What was the total number of jackets and coats in the factory outlet in the end?
|
Jackets |
Coats |
Total |
Before |
5x8 = 40 u |
3x8 = 24 u |
64 u |
Change |
|
- 18 |
|
After |
8x5 = 40 u |
3x5 = 15 u |
55 u |
The number of jackets remains unchanged.
Make the number of jackets the same.
LCM of 3 and 5 is 40.
Number of coats sold
= 24 u - 15 u
= 9 u
1 u = 18 ÷ 9 = 2
Total number of jackets and coats in the end
= 40 u + 15 u
= 55 u
= 55 x 2
= 110
Answer(s): 110