## Geometry: Common Core (15th Edition)

$\frac{9}{11}$
To calculate probability, we need to divide the number of chances for a certain outcome to occur by the total number of outcomes. In this case, there are $2$ tiles with the letter "P" and $11$ tiles in total. This means that the other $11-2=9$ tiles must be "not P." When we divide $9$ by $11$, we get $\frac{9}{11}$, which is the probability of drawing a letter that is not "P," or $P(\text{Not P})$