On a shelf, there were 75 hoodies and jackets. Perry spilt hot juice on the shelf and stained 50% of the jackets and 20% of the hoodies. If 57 hoodies and jackets were still clean, how many stained jackets were there?
| |
Hoodies |
Jackets |
Total |
| Stained |
1 u |
1 p |
18 |
| Clean |
4 u |
1 p |
57 |
| Total |
5 u |
2 p |
75 |
50% =
50100 =
12 20% =
20100 =
15 Number of stained clothes
= 75 - 57
= 18
4 u + 1 p = 57
1 p = 57 - 4 u --- (1)
1 u + 1 p = 18
1 p = 18 - 1 u --- (2)
(2) - (1)
18 - 1 u = 57 - 4 u
4 u - 1 u = 57 - 18
3 u = 39
1 u = 39 ÷ 3 = 13
Number of stained jackets
= 18 - 1 u
= 18 - 13
= 5
Answer(s): 5
