In probability, what does a probability of 0 indicate?

A probability of 0 signifies that an event is impossible to occur. In probability theory, values range from 0 to 1, where 0 indicates that an event cannot happen under any circumstances, and 1 indicates that an event is certain to happen. Therefore, when an event has a probability of 0, it means that there are no scenarios in which this event could occur.

For example, if we consider rolling a standard six-sided die, the event of rolling a 7 has a probability of 0 because it cannot happen with a standard die. This fundamental understanding of probabilities is crucial in assessing events in any probabilistic model.