In a mall that sells skirts, 180 pink skirts were sold and 50% of the remaining skirts that were sold were red. Of the leftover, 40% of the skirts sold were purple skirts and the rest were blue skirts. Given that the number of blue skirts sold was 10% of the total number of skirts sold, how many red and blue skirts were sold altogether?
50% =
50100 =
12 40% =
40100 =
25 10% =
10100 =
110
| Pink |
Red |
Purple |
Blue |
| 180 |
1x5 |
1x5 |
| |
|
2x1 |
3x1 |
| 9x3 |
1x3 |
| 20 u |
5 u |
2 u |
3 u |
The total number of purple and blue shirts is the combined repeated identity. Make the total number of purple and blue shirts the same. LCM of 1 and 5 is 5.
The number of blue shirts is repeated. Make the number of blue shirts the same. LCM of 3 and 1 is 3.
Number of pink skirts
= 27 u - 5 u - 2 u
= 20 u
20 u = 180
1 u = 180 ÷ 20 = 9
Number of red and blue skirts
= 5 u + 3 u
= 8 u
= 8 x 9
= 72
Answer(s): 72
