On a shelf, there were 106 shirts and blouses. Rael spilt coffee on the shelf and stained 50% of the blouses and 25% of the shirts. If 72 shirts and blouses were still clean, how many clean blouses were there?
| |
Shirts |
Blouses |
Total |
| Stained |
1 u |
1 p |
34 |
| Clean |
3 u |
1 p |
72 |
| Total |
4 u |
2 p |
106 |
50% =
50100 =
12 25% =
25100 =
14 Number of stained clothes
= 106 - 72
= 34
3 u + 1 p = 72
1 p = 72 - 3 u --- (1)
1 u + 1 p = 34
1 p = 34 - 1 u --- (2)
(2) - (1)
34 - 1 u = 72 - 3 u
3 u - 1 u = 72 - 34
2 u = 38
1 u = 38 ÷ 2 = 19
Number of clean blouses is the same as the number of stained blouses.
Number of clean blouses
= 34 - 1 u
= 34 - 19
= 15
Answer(s): 15
