If P(E)=0.05, what is the probability of 'not E'?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 0.95
An event and its complement ‘not E’ together cover every outcome, so P(E) + P(not E) = 1.
P(not E) = 1 − 0.05 = 0.95