There were 405 pupils in a school. On the school anniversary,
23 of the boys and
34 of the girls came in pink jackets. The rest came in yellow jackets. The number of girls who wore yellow jackets was thrice of the boys who wore yellow jackets. How many pupils were in pink jackets that day?
| Boys |
Girls |
Total |
| Pink jackets |
Yellow jackets |
Pink jackets |
Yellow jackets |
|
| 2 |
1 |
3x3 |
1x3 |
|
| |
1 |
|
3 |
|
| 2 u |
1 u |
9 u |
3 u |
15 u |
The number of girls who came in yellow jackets is repeated. Make the number of girls who came in yellow jackets the same. LCM of 1 and 3 is 3.
Total number of pupils
= 2 u + 1 u + 9 u + 3 u
= 15 u
15 u = 405
1 u = 405 ÷ 15 = 27
Number of pupils in pink jackets
= 2 u + 9 u
= 11 u
= 11 x 27
= 297
Answer(s): 297
