APA Dictionary of Psychology

mutually exclusive events

Updated on 04/19/2018
  1. two or more events that have no common elements. See also disjoint sets.
  2. in probability theory, two or more events that cannot co-occur: The occurrence of one precludes the simultaneous or subsequent occurrence of the other(s). For example, the alternatives “heads” and “tails” in a single toss of a coin are mutually exclusive events.
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