Question

The ratio of boys to girls in a class was 5:7. If there are 36 students in the class, how many of them are girls? (WITH STEPS)

Answer 1

Answer:

here your answer is 21

Step-by-step explanation:

let the number of boys =5x

let the number of girls=7x

5x+7x=36

12x=36

x=3

no.of girls=7x

=7×3

=21

Answer 2

Answer:

no. of girls = 21

no. of boys=15

Step-by-step explanation:

let the no. of boys = B

let the no. of girls= G

B:G = 5:7

B/G=5/7

7B=5G------}(1)

B+G=36

B=36-G

substitute value of B in (1)

7(36-G)=5G

12G=36(7)

G=21

when G=21 then B=15