Probability of Selecting a Blue Ball

In a box, there are 5 red balls, 7 blue balls, and 3 green balls. If one ball is randomly selected from the box, what is the probability that the ball selected is blue?

To find the probability of selecting a blue ball, you can use the formula:

$$ P( ext{blue}) = \frac{n( ext{blue})}{n( ext{total})} $$

where $n( ext{blue})$ represents the number of blue balls and $n( ext{total})$ represents the total number of balls in the box.