The ratio of the number of boys to the number of girls in a class is 1 : 6. The ratio of the children in the class who scored merit to those who did not score merit is 2 : 1. The ratio of the boys who scored merit to those who did not score merit is 2 : 1. What is the ratio of girls who scored merit to the girls who did not score merit?
Boys |
Girls |
Total |
1x3 = 3 u |
6x3 = 18 u |
7x3 = 21 u |
Merit |
No merit |
Total |
2x7 = 14 u |
1x7 = 7 u |
3x7 = 21 u |
Boys |
Girls |
Total |
3 u |
18 u |
21 u |
Merit |
No Merit |
Merit |
No merit |
|
2 u |
1 u |
12 u |
6 u |
21 u |
The total number of children remains unchanged. Make the total number of children the same. LCM of 7 and 3 is 21.
Girls who scored merit : Girls who did not score merit
12 : 6
2 : 1
Answer(s): 2 : 1