Question

...
6. In a class, the girls are 60% of
the total number of students and
the boys are 18 in number. How
many students are there in the
class?​

Answer 1

${\pink{\underline{\underline{\purple{\textsf{\textbf{Answer : }}}}}}}$

➡ 45 students are there

${\pink{\underline{\underline{\purple{\textsf{\textbf{Explanation : }}}}}}}$

Let's assume the total number is students as x

Where, 60% are girls and the rest are the boys

So, No. of boys = x - (60% of x)

Or, 2x/5

According to the question :

⇒ 2x/5 = 18

⇒ x = 18*5/2

⇒ x = 9*5

⇒ x = 45 students are there.

${\pink{\underline{\underline{\purple{\textsf{\textbf{Hence, Total number of students are 45.}}}}}}}$

Answer 2

$\LARGE\mathcal{\color{maroon}{SOLUTION♡}}$

$\:$

Given that ,

$\longrightarrow$ Girls = 60% of the total students .

$\longrightarrow$ Boys = 18 in number .

$\longrightarrow$ To find total number of students in the class.

$\:$

$\large\underline{\odot{\mid{According\:to\: question:-}}}$

$\implies$ $\mathtt\green{\large{x-}{\frac{60}{100}}}{\mathtt{\large{\green{×x=18}}}}$

$\implies$ $\mathtt\blue{\large{\frac{2x}{5}{=18}}}$

$\implies$ $\large\mathtt{\blue{2x=18×5}}$

$\implies$ $\large\mathtt{\blue{2x=90}}$

$\implies$ $\large\mathtt{\red{\underline{\underline{x=45}}}}$

$\:$

Therefore total number of students in class = 45 .

$\:$