Probability of Drawing a Blue Marble

Jane has a bag containing 5 red marbles, 3 blue marbles, and 2 green marbles. If she randomly selects one marble from the bag, what is the probability that it will be a blue marble?

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

$$ P(E) = \f\frac{n(E)}{n(S)} $$

where:
- $P(E)$ is the probability of the event
- $n(E)$ is the number of favorable outcomes
- $n(S)$ is the total number of outcomes.