Question

If $\frac{2}{11}$ is the probability of an event. What is the probability of the event 'not $A$'

Answer 1

We have $P\left(A\right)=\frac{2}{11}$
Thus $P\left(\text{not A}\right)=1-P\left(A\right)=1-\frac{2}{11}=\frac{9}{11}$