In a shopping centre that sells dresses, 90 yellow dresses were sold and 50% of the remaining dresses that were sold were gold. Of the leftover, 60% of the dresses sold were silver dresses and the rest were red dresses. Given that the number of red dresses sold was 5% of the total number of dresses sold, how many gold and red dresses were sold altogether?
50% =
50100 =
12 60% =
60100 =
35 5% =
5100 =
120
| Yellow |
Gold |
Silver |
Red |
| 90 |
1x5 |
1x5 |
| |
|
3x1 |
2x1 |
| 19x2 |
1x2 |
| 30 u |
5 u |
3 u |
2 u |
The total number of silver and red shirts is the combined repeated identity. Make the total number of silver and red shirts the same. LCM of 1 and 5 is 5.
The number of red shirts is repeated. Make the number of red shirts the same. LCM of 2 and 1 is 2.
Number of yellow dresses
= 38 u - 5 u - 3 u
= 30 u
30 u = 90
1 u = 90 ÷ 30 = 3
Number of gold and red dresses
= 5 u + 2 u
= 7 u
= 7 x 3
= 21
Answer(s): 21
