Question

The ratio of number of girls to the number of boys in a class is 7 : 5. if there are 15 boys in the class, then the number of girls in the class is: *

(a) 14
(b) 21
(c) 28
(d) 36

Answer 1

Click here to get an answer to your question ✍️ The number of boys and girls in a class are in ratio 7:5 . The number of boys is 8 more than the num

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1 answer

47. C. 46.

Answer 2

Answer:

Answer

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 =7×4=28 and number of girls =5×4=20

So, total number of children in the class =28+20=48.

Hence, the class strength is 48.