The ratio of the number of boys to the number of girls in a class is 2 : 5. 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 7 : 5. What is the ratio of girls who scored gold to the girls who did not score gold?
Boys |
Girls |
Total |
2x6 = 12 u |
5x6 = 30 u |
7x6 = 42 u |
Gold |
No gold |
Total |
5x7 = 35 u |
1x7 = 7 u |
6x7 = 42 u |
Boys |
Girls |
Total |
12 u |
30 u |
42 u |
Gold |
No Gold |
Gold |
No gold |
|
7 u |
5 u |
28 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
28 : 2
14 : 1
Answer(s): 14 : 1