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Countable Additivity Probability Axiom


For a countable set of n disjoint events E_1, E_2, ..., E_n

 P( union _(i=1)^nE_i)=sum_(i=1)^nP(E_i).

See also

Countable Additivity, Countable Set

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Cite this as:

Weisstein, Eric W. "Countable Additivity Probability Axiom." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/CountableAdditivityProbabilityAxiom.html

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