If the probability of occurence of an event is p then the probability of non-happening of this event is

Question:

If the probability of occurence of an event is p then the probability of non-happening of this event is      [CBSE 2013C]

(a) (p − 1)
(b) (1 − p)
(c) p

(d) $\left(1-\frac{1}{p}\right)$

 

Solution:

P(occurence of an event) = p
P(non-occurence of this event) = 1 − p

Hence, the correct answer is option (b).

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