On a shelf, there were 212 sweaters and jackets. Vaidev spilt hot soy milk on the shelf and stained 50% of the jackets and 10% of the sweaters. If 186 sweaters and jackets were still clean, how many stained jackets were there?
|
Sweaters |
Jackets |
Total |
Stained |
1 u |
1 p |
26 |
Clean |
9 u |
1 p |
186 |
Total |
10 u |
2 p |
212 |
50% =
50100 =
12 10% =
10100 =
110 Number of stained clothes
= 212 - 186
= 26
9 u + 1 p = 186
1 p = 186 - 9 u --- (1)
1 u + 1 p = 26
1 p = 26 - 1 u --- (2)
(2) - (1)
26 - 1 u = 186 - 9 u
9 u - 1 u = 186 - 26
8 u = 160
1 u = 160 ÷ 8 = 20
Number of stained jackets
= 26 - 1 u
= 26 - 20
= 6
Answer(s): 6