1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# The boys and girls in a college are in the ratio 3:2. If 20% of the boys and 25% of the girls are adults, the percentage of students who are not adults is?

A
58%
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
B
67.5%
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
C
78%
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
82.5%
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
Open in App
Solution

## The correct option is C 78%Lets say there are 100 students in the classThe boys and girls are in the ratio 3:2=3x:2x with unknown multiplier of ′x′Total number of student is 3x+2x=100so 5x=100x=20 Number of boys in the class =3x=60 Number of girls in the class =2x=40Number of boys who are adults = 20% of number of boys =20100×60=12Number of girls who are adults = 25% of number of girls =25100×40=10Total number of boys and girls who are adults =12+10=22Total number of boys and girls who are not adults = 100−22=78Percentage of boys and girls who are not adults =78100×100=78%.so option C is correct.

Suggest Corrections
2
Join BYJU'S Learning Program
Related Videos
Questions on Ratio and Proportion
MATHEMATICS
Watch in App
Join BYJU'S Learning Program