PSLE The ratio of the number of jackets to that of dresses in a shop was 11 : 4 in the end. After 36 dresses were sold, the ratio of the number of jackets to that of dresses became 7 : 2. What was the total number of jackets and dresses in the shop in the end?
|
Jackets |
Dresses |
Total |
Before |
11x7 = 77 u |
4x7 = 28 u |
105 u |
Change |
|
- 36 |
|
After |
7x11 = 77 u |
2x11 = 22 u |
99 u |
The number of jackets remains unchanged.
Make the number of jackets the same.
LCM of 4 and 11 is 77.
Number of dresses sold
= 28 u - 22 u
= 6 u
1 u = 36 ÷ 6 = 6
Total number of jackets and dresses in the end
= 77 u + 22 u
= 99 u
= 99 x 6
= 594
Answer(s): 594