There were 288 pupils in a school. On the school anniversary,
56 of the girls and
34 of the boys came in white blazers. The rest came in pink blazers. The number of boys who wore pink blazers was thrice of the girls who wore pink blazers. How many pupils were in white blazers that day?
| Girls |
Boys |
Total |
| White blazers |
Pink blazers |
White blazers |
Pink blazers |
|
| 5 |
1 |
3x3 |
1x3 |
|
| |
1 |
|
3 |
|
| 5 u |
1 u |
9 u |
3 u |
18 u |
The number of boys who came in pink blazers is repeated. Make the number of boys who came in pink blazers the same. LCM of 1 and 3 is 3.
Total number of pupils
= 5 u + 1 u + 9 u + 3 u
= 18 u
18 u = 288
1 u = 288 ÷ 18 = 16
Number of pupils in white blazers
= 5 u + 9 u
= 14 u
= 14 x 16
= 224
Answer(s): 224
