On a shelf, there were 48 skirts and jackets. Ben spilt juice on the shelf and stained 50% of the jackets and 25% of the skirts. If 35 skirts and jackets were still clean, how many clean jackets were there?
|
Skirts |
Jackets |
Total |
Stained |
1 u |
1 p |
13 |
Clean |
3 u |
1 p |
35 |
Total |
4 u |
2 p |
48 |
50% =
50100 =
12 25% =
25100 =
14 Number of stained clothes
= 48 - 35
= 13
3 u + 1 p = 35
1 p = 35 - 3 u --- (1)
1 u + 1 p = 13
1 p = 13 - 1 u --- (2)
(2) - (1)
13 - 1 u = 35 - 3 u
3 u - 1 u = 35 - 13
2 u = 22
1 u = 22 ÷ 2 = 11
Number of clean jackets is the same as the number of stained jackets.
Number of clean jackets
= 13 - 1 u
= 13 - 11
= 2
Answer(s): 2