Direction: Study the graph and answer the following question.
The graph shows the total number of boys and girls in different classes of a school.
Given:
Number of Boys 
Number of Girls 

Class 4 
42 
48 
Class 5 
50 
45 
Class 6 
38 
30 
Class 7 
21 
18 
Class 8 
25 
14 
Calculation:
The number of girls in Classes 6 and 7 together = (30 + 18) = 48
The number of boys in Classes 4 and 6 together = (42 + 38) = 80
Required percentage = (48/80) × 100%
⇒ 60%
∴ Required percentage is 60%