Question

If P(E) = 0.5, then P(not E) = ?
(a) 0.05
(b) 0.95
(c) $\frac{1}{0.05}$
(d) $\frac{1}{0.95}$

Answer 1

(b) 0.95

Explanation:
P(E) + ​P( not E) = 1
∴ ​P( not E) = 1 ​− P(E)
⇒ 1 − 0.05 = 0.95