Exercise 2 Page 745

When calculating probability, we are comparing the number of $\text{favorable}$ $\text{outcomes}$ to the number of $\text{possible}$ $\text{outcomes}.$ To calculate the probability that a randomly chosen cube is blue we will use the Probability Formula. In the bag, there is a total of $6$ red, $4$ yellow, $3$ blue, and $1$ green cubes. The sum of these values is the number of $\text{possible}$ $\text{outcomes}.$ Out of these, $3$ are blue, which is the number of $\text{favorable}$ $\text{outcomes}.$ Now we have enough information to calculate $P(\text{blue}).$ The probability of choosing a blue cube is $\frac{3}{14},$ which can also be written as $3:14.$