Let the total number of students in the class be x. Given that 60 Since number of boys in the class is 20, 40 ⇒40/100× x= 20 ⇒ nbsp;x= nbsp;20 × 100/40 ⇒ ...

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Multiplication of Fractions

In a class, 6...

Question

In a class, 60% of the students are girls and there are 20 boys. What is the total number of students in the class?

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Solution

The correct option is D
50

Let the total number of students in the class be $x$ .

Given that 60% are girls, so 40% are boys.

Since number of boys in the class is 20,
40% $\times$ $x$ = 20
$\Rightarrow \frac{40}{100} \times x = 20$
$\Rightarrow x = \frac{20 \times 100}{40}$
$\Rightarrow x = 50$

Therefore, the total number of students in the class is 50.

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In a class, 60% of the students are girls and there are 20 boys. What is the total number of students in the class?

The correct option is D 50 Let the total number of students in the class be x. Given that 60% are girls, so 40% are boys. Since number of boys in the class is 20, 40% × x = 20 ⇒40100×x=20 ⇒x=20×10040 ⇒x=50 Therefore, the total number of students in the class is 50.