Question

A bag contains 20 balls, out of which 10 are red and 10 are blue. A ball is picked at random from the bag. The events of drawing a red ball and the probability of drawing a blue ball are:

• A. None of the above
• B. Certain events
• C. Impossible events
• D. Equally likely events

Answer 1

The correct option is D Equally likely events

We know:

$\text{Probability}=\frac{\text{Number of favorable outcomes}}{\text{Numner of possible outcomes}}$

Clearly,
$P\left(Redball\right)=P\left(Blueball\right)=\frac{10}{20}=\frac{1}{2}$

Hence, they are equally likely events.