The ratio of the number of boys to the number of girls in a class is 2 : 5. The ratio of the students in the class who scored gold to those who did not score gold is 2 : 1. The ratio of the boys who scored gold to those who did not score gold is 1 : 5. What is the ratio of girls who scored gold to the girls who did not score gold?
Boys |
Girls |
Total |
2x3 = 6 u |
5x3 = 15 u |
7x3 = 21 u |
Gold |
No gold |
Total |
2x7 = 14 u |
1x7 = 7 u |
3x7 = 21 u |
Boys |
Girls |
Total |
6 u |
15 u |
21 u |
Gold |
No Gold |
Gold |
No gold |
|
1 u |
5 u |
13 u |
2 u |
21 u |
The total number of students remains unchanged. Make the total number of students the same. LCM of 7 and 3 is 21.
Girls who scored gold : Girls who did not score gold
13 : 2
Answer(s): 13 : 2