On a shelf, there were 198 skirts and blouses. Jack spilt hot orange juice on the shelf and stained 50% of the blouses and 10% of the skirts. If 171 skirts and blouses were still clean, how many stained blouses were there?
|
Skirts |
Blouses |
Total |
Stained |
1 u |
1 p |
27 |
Clean |
9 u |
1 p |
171 |
Total |
10 u |
2 p |
198 |
50% =
50100 =
12 10% =
10100 =
110 Number of stained clothes
= 198 - 171
= 27
9 u + 1 p = 171
1 p = 171 - 9 u --- (1)
1 u + 1 p = 27
1 p = 27 - 1 u --- (2)
(2) - (1)
27 - 1 u = 171 - 9 u
9 u - 1 u = 171 - 27
8 u = 144
1 u = 144 ÷ 8 = 18
Number of stained blouses
= 27 - 1 u
= 27 - 18
= 9
Answer(s): 9