On a shelf, there were 36 cardigans and jackets. Zane spilt hot orange juice on the shelf and stained 50% of the jackets and 20% of the cardigans. If 27 cardigans and jackets were still clean, how many stained jackets were there?
|
Cardigans |
Jackets |
Total |
Stained |
1 u |
1 p |
9 |
Clean |
4 u |
1 p |
27 |
Total |
5 u |
2 p |
36 |
50% =
50100 =
12 20% =
20100 =
15 Number of stained clothes
= 36 - 27
= 9
4 u + 1 p = 27
1 p = 27 - 4 u --- (1)
1 u + 1 p = 9
1 p = 9 - 1 u --- (2)
(2) - (1)
9 - 1 u = 27 - 4 u
4 u - 1 u = 27 - 9
3 u = 18
1 u = 18 ÷ 3 = 6
Number of stained jackets
= 9 - 1 u
= 9 - 6
= 3
Answer(s): 3