Impossible Event

Q.

A die is rolled once. What is the probability of getting a 7?

1. $\frac{1}{2}$

2. $0$

3. $\frac{1}{3}$

4. $\frac{1}{4}$

Q.

Probability of an event E that cannot happen and such an event is called __ event

Q. Complete the statements:
The probability of an event that cannot happen is ___.
Such an event is called ___.