Question

The ratio of girls and boys in class is $1:2$. If a student is called randomly for test what is the probability that the student chosen is a girl?

• A. $\frac{1}{3}$
• B. $\frac{2}{3}$
• C. $\frac{1}{2}$
• D. $\frac{3}{4}$

Answer 1

The correct option is A $\frac{1}{3}$

Let number of girls and boys be $x$ and $2x$.

Total no. of students = $3x$

Probability that the student is a girl $=\frac{1}{3}$