No it is never possible
Why not? Because the probability is always between 0 and 1, inclusive of both endpoints.
0 represents impossibility
1 represents absolute certainty
The value 1.5 is larger than 1, so it is outside the range of 0 to 1.
Saying a probability of 1.5 is like saying "the chances of an event happening are 150%" but the largest the percentage can go is 100%, which represents absolute certainty.
