Question

The number of boys and girls in a class are in the ratio 4:5 if the number of boys is 12,then what is the number of girls in the class ​

Answer 1

Answer:

15 is your answer

Step-by-step explanation:

12/x =4/5

12*5=4x

60=4x

x=60/4

x=15

Answer 2

Answer:

Your answer

Step-by-step explanation:

Let he total number of children be x

First you have to add the two numbers in the ratio

4+5=9

Make it the denominator

The numerator would be 4 as it is the number of boys in the ratio

4/9

so the equation will be

4/9 multiply x= 12

x= 12x9/4

x=27

now take numerator 5 as it is the number of girls in the ratio

girls=

5/9 multiply by 27

=15