On a shelf, there were 28 shirts and hoodies. Albert spilt hot tea on the shelf and stained 50% of the hoodies and 25% of the shirts. If 17 shirts and hoodies were still clean, how many stained hoodies were there?
| |
Shirts |
Hoodies |
Total |
| Stained |
1 u |
1 p |
11 |
| Clean |
3 u |
1 p |
17 |
| Total |
4 u |
2 p |
28 |
50% =
50100 =
12 25% =
25100 =
14 Number of stained clothes
= 28 - 17
= 11
3 u + 1 p = 17
1 p = 17 - 3 u --- (1)
1 u + 1 p = 11
1 p = 11 - 1 u --- (2)
(2) - (1)
11 - 1 u = 17 - 3 u
3 u - 1 u = 17 - 11
2 u = 6
1 u = 6 ÷ 2 = 3
Number of stained hoodies
= 11 - 1 u
= 11 - 3
= 8
Answer(s): 8
