Question

There are $45$ boys and girls in a class. Given the probability that a boy is chosen is $\frac{4}{15}$. Find the number of girls

• A. $8$
• B. $12$
• C. $25$
• D. $33$

Answer 1

Answer: (D)

$33$

There are 45 boys and girls in a class. Given the probability that a boy is chosen in $\frac{4}{15}$.

The boys are $P\left(E\right)\times$ total_students = $\frac{4}{25}\ast 45=12$

The number of girls are total-boys = $45-12=33$