A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. If one marble is drawn at random from the bag, what is the probability that the marble drawn is blue?
To find the probability of an event occurring, you can use the formula:
$$ P(A) = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}} $$
Here, the number of favorable outcomes is the number of blue marbles, and the total number of outcomes is the total number of marbles in the bag.