Question

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

Answer 1

Here probability of event A is
P (A) $=\frac{2}{11}$
$\therefore$ Probability of event 'not A' is
$P\left(\overline{A}\right)=1-p\left(A\right)=1-\frac{2}{11}=\frac{9}{11}$