PSLE The ratio of the number of shirts to that of blazers in a shop was 11 : 7 in the end. After 174 blazers were sold, the ratio of the number of shirts to that of blazers became 12 : 5. What was the total number of shirts and blazers in the shop in the end?
|
Shirts |
Blazers |
Total |
Before |
11x12 = 132 u |
7x12 = 84 u |
216 u |
Change |
|
- 174 |
|
After |
12x11 = 132 u |
5x11 = 55 u |
187 u |
The number of shirts remains unchanged.
Make the number of shirts the same.
LCM of 7 and 11 is 132.
Number of blazers sold
= 84 u - 55 u
= 29 u
1 u = 174 ÷ 29 = 6
Total number of shirts and blazers in the end
= 132 u + 55 u
= 187 u
= 187 x 6
= 1122
Answer(s): 1122