In a shopping centre that sells coats, 80 grey coats were sold and 50% of the remaining coats that were sold were black. Of the leftover, 60% of the coats sold were brown coats and the rest were pink coats. Given that the number of pink coats sold was 10% of the total number of coats sold, how many black and grey coats were sold altogether?
50% =
50100 =
12 60% =
60100 =
35 10% =
10100 =
110
| Grey |
Black |
Brown |
Pink |
| 80 |
1x5 |
1x5 |
| |
|
3x1 |
2x1 |
| 9x2 |
1x2 |
| 10 u |
5 u |
3 u |
2 u |
The total number of brown and pink shirts is the combined repeated identity. Make the total number of brown and pink shirts the same. LCM of 1 and 5 is 5.
The number of pink shirts is repeated. Make the number of pink shirts the same. LCM of 2 and 1 is 2.
Number of grey coats
= 18 u - 5 u - 3 u
= 10 u
10 u = 80
1 u = 80 ÷ 50 = 8
Number of black and grey coats
= 5 u + 80
= 5 x 8 + 80
= 40 + 80
= 120
Answer(s): 120
