There were 588 pupils in a school. On the school anniversary,
56 of the boys and
45 of the girls came in grey scarves. The rest came in green scarves. The number of girls who wore green scarves was thrice of the boys who wore green scarves. How many pupils were in grey scarves that day?
| Boys |
Girls |
Total |
| Grey scarves |
Green scarves |
Grey scarves |
Green scarves |
|
| 5 |
1 |
4x3 |
1x3 |
|
| |
1 |
|
3 |
|
| 5 u |
1 u |
12 u |
3 u |
21 u |
The number of girls who came in green scarves is repeated. Make the number of girls who came in green scarves the same. LCM of 1 and 3 is 3.
Total number of pupils
= 5 u + 1 u + 12 u + 3 u
= 21 u
21 u = 588
1 u = 588 ÷ 21 = 28
Number of pupils in grey scarves
= 5 u + 12 u
= 17 u
= 17 x 28
= 476
Answer(s): 476
