The ratio of the number of girls to the number of boys 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 3 : 1. The ratio of the girls who scored merit to those who did not score merit is 1 : 3. What is the ratio of boys who scored merit to the boys who did not score merit?
Girls |
Boys |
Total |
1x4 = 4 u |
6x4 = 24 u |
7x4 = 28 u |
Merit |
No merit |
Total |
3x7 = 21 u |
1x7 = 7 u |
4x7 = 28 u |
Girls |
Boys |
Total |
4 u |
24 u |
28 u |
Merit |
No Merit |
Merit |
No merit |
|
1 u |
3 u |
20 u |
4 u |
28 u |
The total number of children remains unchanged. Make the total number of children the same. LCM of 7 and 4 is 28.
Boys who scored merit : Boys who did not score merit
20 : 4
5 : 1
Answer(s): 5 : 1