# Given the probability p=0.7 that an event will happen, how do you find the probability that the event will not happen?

May 19, 2017

Probability of the event not happening = 0.3

#### Explanation:

Probability of an event happening $p = 0.7$
Probability of the event not happening = ?

Probability of an event happening + Probability of the event not happening $= 1$

Probability of the event not happening$= 1 -$Probability of an event happening $= 1 - 0.7 = 0.3$