There were 285 pupils in a school. On the school anniversary,
56 of the girls and
23 of the boys came in silver windbreakers. The rest came in pink windbreakers. The number of boys who wore pink windbreakers was thrice of the girls who wore pink windbreakers. How many pupils were in silver windbreakers that day?
| Girls |
Boys |
Total |
| Silver windbreakers |
Pink windbreakers |
Silver windbreakers |
Pink windbreakers |
|
| 5 |
1 |
2x3 |
1x3 |
|
| |
1 |
|
3 |
|
| 5 u |
1 u |
6 u |
3 u |
15 u |
The number of boys who came in pink windbreakers is repeated. Make the number of boys who came in pink windbreakers the same. LCM of 1 and 3 is 3.
Total number of pupils
= 5 u + 1 u + 6 u + 3 u
= 15 u
15 u = 285
1 u = 285 ÷ 15 = 19
Number of pupils in silver windbreakers
= 5 u + 6 u
= 11 u
= 11 x 19
= 209
Answer(s): 209
