Question

In class of 60 students, the number of girls is $\frac{7}{5}$ times the number of boys. How many boys are there in the class?

• A. 35
• B. 25
• C. 20
• D. 40

Answer 1

The correct option is B 25

Let the number of boys in class be $x$.
According to the provided data, the number of girls is $\frac{7}{5}x$.
The total number of students in the class is 60.
Therefore,
$x+\frac{7}{5}x=60\Rightarrow \frac{5x+7x}{5}=60\Rightarrow \frac{12x}{5}=60\Rightarrow 12x=60\times 5\Rightarrow 12x=300\Rightarrow x=\frac{300}{12}\Rightarrow x=25$

So, the number of boys is 25.