A measure of how likely an event is to occur, expressed as a number between 0 and 1.

1 answer

The concept you are referring to is known as probability. Probability quantifies the likelihood of an event occurring, with a value of 0 indicating that the event is impossible and a value of 1 indicating that the event is certain to happen. Probabilities can be expressed as fractions, decimals, or percentages, and they provide a way to assess uncertainty in various contexts, from simple everyday situations to complex statistical analyses.