## Geometry: Common Core (15th Edition)

$\frac{11}{13}$
To calculate probability, we need to divide the number of chances for a certain outcome to occur by the total number of outcomes. To find the number of cars that are not blue, we subtract the number that are blue from the total number of cars. In this case, there are $65-10=55$ cars that are not blue, and $65$ in total. When we divide $55$ by $65$, we get $\frac{11}{13}$, which is the experimental probability a car is not blue, or $P(\text{not blue})$.