Answer
$1-P(E)$
Work Step by Step
The sum of the probabilities of an event not happening and an event happening is 1 so 1 minus the probability of an event happening would be equal to the probability of an event not happening.
The event of not rolling a 4 on a die
$1-P(E) = 1-\frac{1}{6} = \frac{5}{6}$
