Question

# What is the probability of an impossible event?

Since, we know that for an impossible event number of favorable outcomes $= 0$
$= \dfrac{{{\text{number of favorable events}}}}{{{\text{total number of events}}}} \\ = \dfrac{0}{{{\text{total number of events}}}} \\ = 0 \\$
Note- Probability exists on a scale from $0{\text{ to 1}}$ , with $0$being defined as an impossible event and being $1$defined as a sure event. Everything between $0{\text{ and 1}}$ is possible and with increasing probability, events become more likely.