Conditional Probability of Drawing a Blue Ball

A box contains 5 red balls and 3 blue balls. A ball is drawn at random from the box. What is the conditional probability that the ball drawn is blue given that it is one of the balls in the box?

To calculate the conditional probability, we can use the formula:

$$ P(A|B) = \frac{P(A \cap B)}{P(B)} $$