Percentage of students in various courses (A,B,C,D,E,F) and Percentage of girsl out of these.
Total students : 1200
(800 girls +400 boys )

For course D what is the respective of ratio of boys and girls ?

Options

A. `3:4`
B. `4:5`
C. `3:5`
D. `5:6`

Answer

A

Explanation

For course D
No. of girls `=30` of 800
`=(30'800)/(100)=240`
No. of students
`=35'(1)/(100)'12000=420`
`:.` No of boys `=420-240=180`
`:.` Required ratio = `180:240=3:4`