Question

Find the probability that a number $9$ turns up in a single throw of die.

Answer 1

Total number of cases $=6$
i.e., $\{1,2,3,4,5,6\}$

In the above cases, the number $9$ is not one of the likely outcomes.

Hence, getting the number $9$ is impossible.

Number of favourable outcome$=0$

So, P(getting number $9$)$=\frac{0}{6}$

So, P(getting number $9$) $=0$.