There were 429 students in a school. On the school anniversary,
34 of the boys and
23 of the girls came in white sweaters. The rest came in silver sweaters. The number of girls who wore silver sweaters was thrice of the boys who wore silver sweaters. How many students were in white sweaters that day?
| Boys |
Girls |
Total |
| White sweaters |
Silver sweaters |
White sweaters |
Silver sweaters |
|
| 3 |
1 |
2x3 |
1x3 |
|
| |
1 |
|
3 |
|
| 3 u |
1 u |
6 u |
3 u |
13 u |
The number of girls who came in silver sweaters is repeated. Make the number of girls who came in silver sweaters 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 = 429
1 u = 429 ÷ 13 = 33
Number of students in white sweaters
= 3 u + 6 u
= 9 u
= 9 x 33
= 297
Answer(s): 297
