Probability of Selecting Red or Green Marble

In a small bag, there are 5 red marbles, 3 blue marbles, and 2 green marbles. If you randomly select one marble from the bag, what is the probability that the marble is either red or green?

To find the probability of an event, you can use the formula:

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