There were 150 pupils in a school. On the school anniversary,
34 of the boys and
23 of the girls came in green blazers. The rest came in yellow blazers. The number of girls who wore yellow blazers was twice of the boys who wore yellow blazers. How many pupils were in green blazers that day?
| Boys |
Girls |
Total |
| Green blazers |
Yellow blazers |
Green blazers |
Yellow blazers |
|
| 3 |
1 |
2x2 |
1x2 |
|
| |
1 |
|
2 |
|
| 3 u |
1 u |
4 u |
2 u |
10 u |
The number of girls who came in yellow blazers is repeated. Make the number of girls who came in yellow blazers the same. LCM of 1 and 2 is 2.
Total number of pupils
= 3 u + 1 u + 4 u + 2 u
= 10 u
10 u = 150
1 u = 150 ÷ 10 = 15
Number of pupils in green blazers
= 3 u + 4 u
= 7 u
= 7 x 15
= 105
Answer(s): 105
