Question

The table gives a set of outcomes and their probabilities. Let A be the event "the outcome is greater than 2". Find P(not A). Outcome Probability 1 0.22 2 0.08 3 0.13 4 0.33 5 0.24

Answer 1

Remember that

$P(\text{not A)}=1-P(A)$

We know that:

$\begin{gathered} P(A)=0.13+\text{0}.33+0.24 \\ \rightarrow P(A)=0.7 \end{gathered}$

This way,

$\begin{gathered} P(\text{not A)}=1-0.7 \\ \rightarrow P(\text{not A)}=0.3 \end{gathered}$