On a shelf, there were 178 jackets and blouses. Ken spilt coffee on the shelf and stained 50% of the blouses and 10% of the jackets. If 149 jackets and blouses were still clean, how many clean blouses were there?
|
Jackets |
Blouses |
Total |
Stained |
1 u |
1 p |
29 |
Clean |
9 u |
1 p |
149 |
Total |
10 u |
2 p |
178 |
50% =
50100 =
12 10% =
10100 =
110 Number of stained clothes
= 178 - 149
= 29
9 u + 1 p = 149
1 p = 149 - 9 u --- (1)
1 u + 1 p = 29
1 p = 29 - 1 u --- (2)
(2) - (1)
29 - 1 u = 149 - 9 u
9 u - 1 u = 149 - 29
8 u = 120
1 u = 120 ÷ 8 = 15
Number of clean blouses is the same as the number of stained blouses.
Number of clean blouses
= 29 - 1 u
= 29 - 15
= 14
Answer(s): 14