There were 690 students in a school. On the school anniversary,
23 of the boys and
45 of the girls came in white blazers. The rest came in pink blazers. The number of girls who wore pink blazers was four times of the boys who wore pink blazers. How many students were in white blazers that day?
| Boys |
Girls |
Total |
| White blazers |
Pink blazers |
White blazers |
Pink blazers |
|
| 2 |
1 |
4x4 |
1x4 |
|
| |
1 |
|
4 |
|
| 2 u |
1 u |
16 u |
4 u |
23 u |
The number of girls who came in pink blazers is repeated. Make the number of girls who came in pink blazers the same. LCM of 1 and 4 is 4.
Total number of students
= 2 u + 1 u + 16 u + 4 u
= 23 u
23 u = 690
1 u = 690 ÷ 23 = 30
Number of students in white blazers
= 2 u + 16 u
= 18 u
= 18 x 30
= 540
Answer(s): 540
