PSLE The ratio of the number of blouses to that of jumpsuits in a shopping centre was 11 : 10 in the end. After 85 jumpsuits were sold, the ratio of the number of blouses to that of jumpsuits became 5 : 3. What was the total number of blouses and jumpsuits in the shopping centre in the end?
|
Blouses |
Jumpsuits |
Total |
Before |
11x5 = 55 u |
10x5 = 50 u |
105 u |
Change |
|
- 85 |
|
After |
5x11 = 55 u |
3x11 = 33 u |
88 u |
The number of blouses remains unchanged.
Make the number of blouses the same.
LCM of 10 and 11 is 55.
Number of jumpsuits sold
= 50 u - 33 u
= 17 u
1 u = 85 ÷ 17 = 5
Total number of blouses and jumpsuits in the end
= 55 u + 33 u
= 88 u
= 88 x 5
= 440
Answer(s): 440