An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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additive law of probability
  قانون ِ بردایشی ِ شوانایی  
qânun-e bardâyeši-ye šavânâyi
Fr.: loi additive de probabilité  

If E1, E2, …, En
are n → mutually exclusive events, then the probability of occurrence of at least one of them is the sum of their individual probabilities: P(E1 + E2 + … + En) = P(E1) + P(E2) + … + P(En).

See also: → additive; → law; → probability.