Probability of any event x lies

Probability always lies in between 0 and 1. This is because it is the ratio of (a fraction of a part of a whole) and (the whole itself)

If an outcome has no favorable chances, then its probability is 0 and if the outcome is the only outcome in the experiment than it has a 100% certainty and Probability as 1.

Therefore, Probability ϵ [0,1]