Question

A class has 21 students.the ratio of girls to boys is 4:3.how many girls are there in the class?

Answer 1

total students=21
ratio of girls to boys=4:3
sum of ratio=4+3=7
total girls in class= 4÷7×21 (4/7×21)
=12
total boys in class=3÷7×21 (4/7×21)
=9
total students in class=girls+boys=12+9=21
so , there are 12 girls in class.