There were 665 students in a school. On the school anniversary,
23 of the girls and
34 of the boys came in white caps. The rest came in red caps. The number of boys who wore red caps was four times of the girls who wore red caps. How many students were in white caps that day?
Girls |
Boys |
Total |
White caps |
Red caps |
White caps |
Red caps |
|
2 |
1 |
3x4 |
1x4 |
|
|
1 |
|
4 |
|
2 u |
1 u |
12 u |
4 u |
19 u |
The number of boys who came in red caps is repeated. Make the number of boys who came in red caps the same. LCM of 1 and 4 is 4.
Total number of students
= 2 u + 1 u + 12 u + 4 u
= 19 u
19 u = 665
1 u = 665 ÷ 19 = 35
Number of students in white caps
= 2 u + 12 u
= 14 u
= 14 x 35
= 490
Answer(s): 490