There were 285 students in a school. On the school anniversary,
34 of the girls and
45 of the boys came in brown scarves. The rest came in silver scarves. The number of boys who wore silver scarves was thrice of the girls who wore silver scarves. How many students were in brown scarves that day?
| Girls |
Boys |
Total |
| Brown scarves |
Silver scarves |
Brown scarves |
Silver scarves |
|
| 3 |
1 |
4x3 |
1x3 |
|
| |
1 |
|
3 |
|
| 3 u |
1 u |
12 u |
3 u |
19 u |
The number of boys who came in silver scarves is repeated. Make the number of boys who came in silver scarves the same. LCM of 1 and 3 is 3.
Total number of students
= 3 u + 1 u + 12 u + 3 u
= 19 u
19 u = 285
1 u = 285 ÷ 19 = 15
Number of students in brown scarves
= 3 u + 12 u
= 15 u
= 15 x 15
= 225
Answer(s): 225
