There were 252 pupils in a school. On the school anniversary,
45 of the girls and
23 of the boys came in green shirts. The rest came in brown shirts. The number of boys who wore brown shirts was thrice of the girls who wore brown shirts. How many pupils were in green shirts that day?
| Girls |
Boys |
Total |
| Green shirts |
Brown shirts |
Green shirts |
Brown shirts |
|
| 4 |
1 |
2x3 |
1x3 |
|
| |
1 |
|
3 |
|
| 4 u |
1 u |
6 u |
3 u |
14 u |
The number of boys who came in brown shirts is repeated. Make the number of boys who came in brown shirts the same. LCM of 1 and 3 is 3.
Total number of pupils
= 4 u + 1 u + 6 u + 3 u
= 14 u
14 u = 252
1 u = 252 ÷ 14 = 18
Number of pupils in green shirts
= 4 u + 6 u
= 10 u
= 10 x 18
= 180
Answer(s): 180
