Question

In a college, the ratio of the number of boys to girls is $8:5$. If there are $200$ girls, the total number of students in the college is

• A. $420$
• B. $520$
• C. $620$
• D. $720$

Answer 1

The correct option is B $520$

Let the boys are $8x$ and Girls are $5x$
$\Rightarrow 5x=200$
$\Rightarrow x=40$
Total students $=8x+5x=13x=13\left(\begin{array}{c}40\end{array}\right)=520$