There were 627 pupils in a school. On the school anniversary,
23 of the girls and
34 of the boys came in green blazers. The rest came in brown blazers. The number of boys who wore brown blazers was four times of the girls who wore brown blazers. How many pupils were in green blazers that day?
| Girls |
Boys |
Total |
| Green blazers |
Brown blazers |
Green blazers |
Brown blazers |
|
| 2 |
1 |
3x4 |
1x4 |
|
| |
1 |
|
4 |
|
| 2 u |
1 u |
12 u |
4 u |
19 u |
The number of boys who came in brown blazers is repeated. Make the number of boys who came in brown blazers the same. LCM of 1 and 4 is 4.
Total number of pupils
= 2 u + 1 u + 12 u + 4 u
= 19 u
19 u = 627
1 u = 627 ÷ 19 = 33
Number of pupils in green blazers
= 2 u + 12 u
= 14 u
= 14 x 33
= 462
Answer(s): 462
