On a shelf, there were 86 blouses and jackets. Glen spilt hot tea on the shelf and stained 50% of the jackets and 10% of the blouses. If 71 blouses and jackets were still clean, how many stained jackets were there?
| |
Blouses |
Jackets |
Total |
| Stained |
1 u |
1 p |
15 |
| Clean |
9 u |
1 p |
71 |
| Total |
10 u |
2 p |
86 |
50% =
50100 =
12 10% =
10100 =
110 Number of stained clothes
= 86 - 71
= 15
9 u + 1 p = 71
1 p = 71 - 9 u --- (1)
1 u + 1 p = 15
1 p = 15 - 1 u --- (2)
(2) - (1)
15 - 1 u = 71 - 9 u
9 u - 1 u = 71 - 15
8 u = 56
1 u = 56 ÷ 8 = 7
Number of stained jackets
= 15 - 1 u
= 15 - 7
= 8
Answer(s): 8
