PSLE The ratio of the number of coats to that of vests in a shopping centre was 11 : 2 in the end. After 24 vests were sold, the ratio of the number of coats to that of vests became 7 : 1. What was the total number of coats and vests in the shopping centre in the end?
|
Coats |
Vests |
Total |
Before |
11x7 = 77 u |
2x7 = 14 u |
91 u |
Change |
|
- 24 |
|
After |
7x11 = 77 u |
1x11 = 11 u |
88 u |
The number of coats remains unchanged.
Make the number of coats the same.
LCM of 2 and 11 is 77.
Number of vests sold
= 14 u - 11 u
= 3 u
1 u = 24 ÷ 3 = 8
Total number of coats and vests in the end
= 77 u + 11 u
= 88 u
= 88 x 8
= 704
Answer(s): 704