Question

the number of boys and girls are in the ratio 5:7. the number of boys is 8 less than the number of girls ​

Answer 1

Answer:

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Answer 2

Answer:40

Step-by-step explain:

Let the number of boys be 7x and that of girls be 5x.

According to the given condition, we have

Number of boys = Number of girls -8

⇒7x=5x-8

⇒7x−5x=8 ....[Transposing 5x to LHS]

⇒2x=8

⇒x=  

2

8

​  

=4

Therefore, number of boys =5×4=20 and number of girls =5×4=20

So, total number of children in the class =20+20=40.

Hence, the class strength is 40.