PSLE The ratio of the number of blouses to that of coats in a boutique was 3 : 2 at first. After 34 coats were sold, the ratio of the number of blouses to that of coats became 10 : 1. What was the total number of blouses and coats in the boutique at first?
|
Blouses |
Coats |
Total |
Before |
3x10 = 30 u |
2x10 = 20 u |
50 u |
Change |
|
- 34 |
|
After |
10x3 = 30 u |
1x3 = 3 u |
33 u |
The number of blouses remains unchanged. Make the number of blouses the same.
LCM of 10 and 3 is 30.
Number of coats sold
= 20 u - 3 u
= 17 u
1 u = 34 ÷ 17 = 2
Total number of blouses and coats at first
= 30 u + 20 u
= 50 u
= 50 x 2
= 100
Answer(s): 100