There were 480 students in a school. On the school anniversary,
56 of the girls and
23 of the boys came in pink vests. The rest came in purple vests. The number of boys who wore purple vests was thrice of the girls who wore purple vests. How many students were in pink vests that day?
| Girls |
Boys |
Total |
| Pink vests |
Purple vests |
Pink vests |
Purple vests |
|
| 5 |
1 |
2x3 |
1x3 |
|
| |
1 |
|
3 |
|
| 5 u |
1 u |
6 u |
3 u |
15 u |
The number of boys who came in purple vests is repeated. Make the number of boys who came in purple vests the same. LCM of 1 and 3 is 3.
Total number of students
= 5 u + 1 u + 6 u + 3 u
= 15 u
15 u = 480
1 u = 480 ÷ 15 = 32
Number of students in pink vests
= 5 u + 6 u
= 11 u
= 11 x 32
= 352
Answer(s): 352
