Study the following table and answer the question below.
|
School name |
Total number of students enrolled |
Percentage of enrolled students, opted Biology |
Ratio of male to female students who opted Biology |
|
A |
900 |
30 |
7:8 |
|
B |
400 |
36 |
5:7 |
|
C |
1000 |
24 |
5:19 |
|
D |
800 |
18 |
3:9 |
Find the ratio of the number of female students who opted biology in school B and school D.
Answer & explanation
Correct answer: option 1
In school B , Number of students enrolled in biology = 36% of 400 = 144
Number of female students = \(\frac{7}{12}\) × 144 = 84
In school D , Number of students enrolled in biology = 18% of 800 = 144
Number of female students = \(\frac{9}{12}\) × 144 = 108
Required ratio , 84 : 108 = 7 : 9