Question

the ratio of girls to that of boys in the class is 5 :4 if there are 25 girls , then the number of boy in the class is

Answer 1

Answer: 20 boys.

Step-by-step explanation:

Let number of boys be B

So,

Number of girls : number of boys = 5 : 4

25 / B = 5/4

25×4 = 5B

B = 100/5

B = 20

Answer 2

Let the ratios be 5x and 4x
Girl's ratio=5x
Boys ratios=4x
therefore according to the problem,
5x=25
>x=25÷5
>x=5

thus the number of boys=4x>4×5=20....