Probability of Selecting a Blue Marble

In a bag, there are 5 red marbles, 3 blue marbles, and 2 green marbles. If a marble is selected at random from the bag, what is the probability that the marble will be blue?

To find the probability of choosing a blue marble, we can use the formula:

$$P( ext{blue}) = \frac{\text{Number of blue marbles}}{\text{Total number of marbles}}$$