Chapter 11 - Probability and Statistics - 11-3 Probability of Multiple Events - Practice and Problem-Solving Exercises - Page 693: 51

$P(5)=\dfrac{1}{6}$

In a roll of a die, there are $6$ possible outcomes. Since there is only $1$ event corresponding to rolling a $5$, then the probability of rolling a $5,$ $P(5),$ is \begin{align*}\require{cancel} P(5)&=\dfrac{1}{6} .\end{align*}