If the probability of event $E$ is $0.05$, what is the probability of the complement of $E$ (i.e., the event "not $E$")?

Step-by-step solution

1. Recall the complement rule: $P(\text{not }E)=1-P(E)$.
2. Substitute the given value: $P(\text{not }E)=1-0.05=0.95$.
3. Thus the probability of not $E$ is $0.95$.

Concept tested: Complementary probability

Published 4 October 2026 · How this solution was prepared and checked