Probability of Selecting a Ball from a Bag

A bag contains 6 red balls, 4 blue balls, and 10 green balls. If a ball is randomly selected from the bag, what is the probability that the ball is either red or blue?

To calculate this probability, first determine the total number of balls in the bag. Then, find the total number of favorable outcomes (red and blue balls) and apply the basic probability formula:

$P(E) = \f\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$