Question

the ratio of boys & girls is 10:3 when 36 girl more joinrd the ratio becomes 10:7 find the no of boys

Answer 1

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Answer 2

The no of boys is 90.

As per question we need to find the number of boys.

The given data is the ratio of boys & girls is 10:3 when 36 girl more joinrd the ratio becomes 10:7.

let the ratio of boys and girls be 10x and 3x.

now according to the question

⇒ $\frac{10x}{3x+36}$$=\frac{10}{7}$

⇒ 7 *10x =10*(3x+36),

⇒70x= 30x + 360

⇒70x-30x=360

⇒40x=360

⇒x=$\frac{360}{40}$

⇒x = 9

now the boys =10x

                       = 10*9

                        = 90

Hence the no of boys is 90.

To learn more about ratio follow the given link

https://brainly.com/question/1310146?

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