If $P(E) = 0.4$, what is the probability that event $E$ does **not** occur?
A$0$
B$0.4$
C$0.6$
D$1$
Answer & Solution
Correct answer: C. $0.6$
Complement rule: $P(\text{not } E) = 1 - P(E) = 1 - 0.4 = 0.6$.
- Trap B restates $P(E)$.
- Trap A and D are extreme cases.
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