There were 169 students in a school. On the school anniversary,
45 of the boys and
34 of the girls came in grey jackets. The rest came in green jackets. The number of girls who wore green jackets was twice of the boys who wore green jackets. How many students were in grey jackets that day?
| Boys |
Girls |
Total |
| Grey jackets |
Green jackets |
Grey jackets |
Green jackets |
|
| 4 |
1 |
3x2 |
1x2 |
|
| |
1 |
|
2 |
|
| 4 u |
1 u |
6 u |
2 u |
13 u |
The number of girls who came in green jackets is repeated. Make the number of girls who came in green jackets the same. LCM of 1 and 2 is 2.
Total number of students
= 4 u + 1 u + 6 u + 2 u
= 13 u
13 u = 169
1 u = 169 ÷ 13 = 13
Number of students in grey jackets
= 4 u + 6 u
= 10 u
= 10 x 13
= 130
Answer(s): 130
