The ratio of the number of boys to the number of girls in a class is 3 : 4. The ratio of the pupils in the class who scored gold to those who did not score gold is 5 : 1. The ratio of the boys who scored gold to those who did not score gold is 13 : 5. What is the ratio of girls who scored gold to the girls who did not score gold?
Boys |
Girls |
Total |
3x6 = 18 u |
4x6 = 24 u |
7x6 = 42 u |
Gold |
No gold |
Total |
5x7 = 35 u |
1x7 = 7 u |
6x7 = 42 u |
Boys |
Girls |
Total |
18 u |
24 u |
42 u |
Gold |
No Gold |
Gold |
No gold |
|
13 u |
5 u |
22 u |
2 u |
42 u |
The total number of pupils remains unchanged. Make the total number of pupils the same. LCM of 7 and 6 is 42.
Girls who scored gold : Girls who did not score gold
22 : 2
11 : 1
Answer(s): 11 : 1