The ratio of the number of girls to the number of boys in a class is 1 : 6. The ratio of the pupils in the class who scored merit to those who did not score merit is 4 : 1. The ratio of the girls who scored merit to those who did not score merit is 1 : 4. What is the ratio of boys who scored merit to the boys who did not score merit?
Girls |
Boys |
Total |
1x5 = 5 u |
6x5 = 30 u |
7x5 = 35 u |
Merit |
No merit |
Total |
4x7 = 28 u |
1x7 = 7 u |
5x7 = 35 u |
Girls |
Boys |
Total |
5 u |
30 u |
35 u |
Merit |
No Merit |
Merit |
No merit |
|
1 u |
4 u |
27 u |
3 u |
35 u |
The total number of pupils remains unchanged. Make the total number of pupils the same. LCM of 7 and 5 is 35.
Boys who scored merit : Boys who did not score merit
27 : 3
9 : 1
Answer(s): 9 : 1