Question

The table gives a set of outcomes and their probabilities. Let A be the event "the outcome is divisible by 3". Find P(not A).
Outcome Probability
1 0.02
2 0.04
3 0.23
4 0.33
5 0.11
6 0.05
7 0.03
8 0.19

Answer 1

A is {3,6} so P(A) = 0.23 + 0.05 = 0.28. Thus P(not A) = 1 − 0.28 = 0.72.