There were 299 students in a school. On the school anniversary,
34 of the girls and
23 of the boys came in grey jackets. The rest came in silver jackets. The number of boys who wore silver jackets was thrice of the girls who wore silver jackets. How many students were in grey jackets that day?
| Girls |
Boys |
Total |
| Grey jackets |
Silver jackets |
Grey jackets |
Silver jackets |
|
| 3 |
1 |
2x3 |
1x3 |
|
| |
1 |
|
3 |
|
| 3 u |
1 u |
6 u |
3 u |
13 u |
The number of boys who came in silver jackets is repeated. Make the number of boys who came in silver jackets the same. LCM of 1 and 3 is 3.
Total number of students
= 3 u + 1 u + 6 u + 3 u
= 13 u
13 u = 299
1 u = 299 ÷ 13 = 23
Number of students in grey jackets
= 3 u + 6 u
= 9 u
= 9 x 23
= 207
Answer(s): 207
