Probability of Picking a Blue Marble

A bag contains 3 red marbles, 2 blue marbles, and 5 green marbles. If you randomly pick one marble from the bag, what is the probability that the marble is blue?

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

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