Question

the ratio of boy and girl in a class 4:5 of the number of boys is 24 find the number of girls​

Answer 1

        $\text{\huge \bf \underline{Answer:}}$

        $\text{Let the number of girls in the class be }x$

        $\text{Number of boys in the class} = 24$

        $\text{Ratio of boy and girl} = 4:5$

$\implies \: \dfrac{24}{x} = \dfrac45$

$\implies \: 24(5) = 4(x)$

$\implies \: 120 = 4x$

$\implies \: \dfrac{120}{4} = x$

$\implies \: 30 = x$

   $\therefore \: \: \: \boxed{\boxed{\text{The number of girls in the class} = 30}}$