In a shop that sells skirts, 70 grey skirts were sold and 50% of the remaining skirts that were sold were green. Of the leftover, 40% of the skirts sold were blue skirts and the rest were gold skirts. Given that the number of gold skirts sold was 20% of the total number of skirts sold, how many green and grey skirts were sold altogether?
50% =
50100 =
12 40% =
40100 =
25 20% =
20100 =
15
| Grey |
Green |
Blue |
Gold |
| 70 |
1x5 |
1x5 |
| |
|
2x1 |
3x1 |
| 4x3 |
1x3 |
| 5 u |
5 u |
2 u |
3 u |
The total number of blue and gold shirts is the combined repeated identity. Make the total number of blue and gold shirts the same. LCM of 1 and 5 is 5.
The number of gold shirts is repeated. Make the number of gold shirts the same. LCM of 3 and 1 is 3.
Number of grey skirts
= 12 u - 5 u - 2 u
= 5 u
5 u = 70
1 u = 70 ÷ 50 = 14
Number of green and grey skirts
= 5 u + 70
= 5 x 14 + 70
= 70 + 70
= 140
Answer(s): 140
