The ratio of the number of boys to the number of girls in a class is 2 : 3. The ratio of the pupils in the class who scored gold to those who did not score gold is 3 : 1. The ratio of the boys who scored gold to those who did not score gold is 7 : 1. What is the ratio of girls who scored gold to the girls who did not score gold?
Boys |
Girls |
Total |
2x4 = 8 u |
3x4 = 12 u |
5x4 = 20 u |
Gold |
No gold |
Total |
3x5 = 15 u |
1x5 = 5 u |
4x5 = 20 u |
Boys |
Girls |
Total |
8 u |
12 u |
20 u |
Gold |
No Gold |
Gold |
No gold |
|
7 u |
1 u |
8 u |
4 u |
20 u |
The total number of pupils remains unchanged. Make the total number of pupils the same. LCM of 5 and 4 is 20.
Girls who scored gold : Girls who did not score gold
8 : 4
2 : 1
Answer(s): 2 : 1