What is the probability of an event that is considered "certain"?

The probability of an event that is considered "certain" is represented by the value 1. This means that the event is guaranteed to occur. When evaluating probability, certain events are those that will definitely happen under the given circumstances.

In probability theory, the range of probabilities extends from 0 to 1, where 0 indicates an event that will not occur at all, and 1 signifies an event that is certain to occur. This distinction is foundational in understanding how to assess and interpret different outcomes in probability scenarios.

In contrast to a certain event, outcomes that have probabilities less than 1—such as 0.5 (indicating a 50% chance) or 0.75 (indicating a 75% chance)—represent uncertain events and showcase the variability in chance. Therefore, the probability of an event that is certain is consistently assigned the value of 1.