Event (probability theory)

In statistics and probability theory, set of outcomes to which a probability is assigned

In probability theory, an event is a subset of outcomes of an experiment (a subset of the sample space) to which a probability is assigned. A single outcome may be an element of many different events, and different events in an experiment are usually not equally likely, since they may include very different groups of outcomes. An event consisting of only a single outcome is called an elementary event or an atomic event; that is, it is a singleton set.

From Wikipedia, under CC BY-SA. More on occurri.