Question

The ratio of boys to girls in a class is 3:5. There are 40 students in the class. How many students are boys?

Answer 1

let the common multiple be x..

according to given condition,

3x + 5x = 40

x = 40/8

x =5

boys =3x =3×5 = 15boys

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Answer 2

Answer:

Let the ratio of boys to girl be 3x : 5x

A/q

3x + 5x = 40

=> 8x = 40

=> x = 40/8 = 5

No. of boys = 3x

= 3×5

= 15

No. of girls = 5x

= 5×5

= 25

Hence, total 15 boys are in a class.

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