PSLE The ratio of the number of windbreakers to that of vests in a shopping centre was 3 : 2 in the end. After 14 vests were sold, the ratio of the number of windbreakers to that of vests became 5 : 1. What was the total number of windbreakers and vests in the shopping centre in the end?
|
Windbreakers |
Vests |
Total |
Before |
3x5 = 15 u |
2x5 = 10 u |
25 u |
Change |
|
- 14 |
|
After |
5x3 = 15 u |
1x3 = 3 u |
18 u |
The number of windbreakers remains unchanged.
Make the number of windbreakers the same.
LCM of 2 and 3 is 15.
Number of vests sold
= 10 u - 3 u
= 7 u
1 u = 14 ÷ 7 = 2
Total number of windbreakers and vests in the end
= 15 u + 3 u
= 18 u
= 18 x 2
= 36
Answer(s): 36