There were 396 students in a school. On the school anniversary,
23 of the girls and
45 of the boys came in red shirts. The rest came in pink shirts. The number of boys who wore pink shirts was thrice of the girls who wore pink shirts. How many students were in red shirts that day?
| Girls |
Boys |
Total |
| Red shirts |
Pink shirts |
Red shirts |
Pink shirts |
|
| 2 |
1 |
4x3 |
1x3 |
|
| |
1 |
|
3 |
|
| 2 u |
1 u |
12 u |
3 u |
18 u |
The number of boys who came in pink shirts is repeated. Make the number of boys who came in pink shirts the same. LCM of 1 and 3 is 3.
Total number of students
= 2 u + 1 u + 12 u + 3 u
= 18 u
18 u = 396
1 u = 396 ÷ 18 = 22
Number of students in red shirts
= 2 u + 12 u
= 14 u
= 14 x 22
= 308
Answer(s): 308
