There were 266 pupils in a school. On the school anniversary,
23 of the girls and
34 of the boys came in white vests. The rest came in grey vests. The number of boys who wore grey vests was four times of the girls who wore grey vests. How many pupils were in white vests that day?
| Girls |
Boys |
Total |
| White vests |
Grey vests |
White vests |
Grey vests |
|
| 2 |
1 |
3x4 |
1x4 |
|
| |
1 |
|
4 |
|
| 2 u |
1 u |
12 u |
4 u |
19 u |
The number of boys who came in grey vests is repeated. Make the number of boys who came in grey vests 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 = 266
1 u = 266 ÷ 19 = 14
Number of pupils in white vests
= 2 u + 12 u
= 14 u
= 14 x 14
= 196
Answer(s): 196
