Question

the numbers of boy and girls in a class are in the ratio 7 : 5. The numbers of boy is 8 more than the numbers of girls. What is the strength of class ?​

Answer 1

Step-by-step explanation:

no. of boys = 7x

no. of girls = 5x

7x = 5x + 8

=> 2x = 8

=> x = 4

Now,

no. of boys = 7 x 4

= 28

and join. of girls = 5 x 4

= 20

Hence,

strength of the class = 28 + 20

= 48

Answer 2

Answer:

Step-by-step explanation:

Given ratio of boys to girls is 7:5

I.e let 7x be the total number of boys.

IIlrly let girls' total be 5x.

According to the question

7x=5x +8

=> 7x-5x=8

=>2x = 8

=>x=4

Therefore total strength of class=

=7(4)+5(4)

=48.

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