Question

For any event A P(A) P(not A) = 1

If the probability that an event occurs is 0.8, the probability the event does not occur is

Answer 1

`P( A) \: + P( \bar A) = 1 \\ 0.8 + P( \bar A) = 1 \\ P( \bar A) = = 1 - 0.8 = 0.2`