Question

Out of $35$ students participating in a debate $10$ are girls. The probability that winner is a boy is

• A. $\frac{1}{7}$
• B. $\frac{3}{7}$
• C. $\frac{4}{7}$
• D. $\frac{5}{7}$

Answer 1

The correct option is D $\frac{5}{7}$

Out of $35$ students participating in a debate, $10$ are girls.

Therefore the number of boys are $=35-10=25$

The probability that winner is a boy is :$P\left(E\right)=\frac{25}{35}=\frac{5}{7}$