# How do you find the probability of an event not happening?

Feb 10, 2017

$P \left(\text{Event Not Happening") = 1-P("Event Happening}\right)$

#### Explanation:

For any event:

$P \left(\text{Event Happening") + P("Event Not Happening}\right) = 1$

Hence:

$P \left(\text{Event Not Happening") = 1-P("Event Happening}\right)$