Question

If the probability of an event happening is 0.45.
​
​What is the probability of the event NOT happening?
​A0.55
B0.50
C0.65

Answer 1

A.) 0.55
This is because the probability has to com out to 1 (technically 100%) so, 1-0.45 is 0.55 (these could all be percentages if you multiply them by 100)