Axiom: Addition of the Probability of Mutually Exclusive Events
Any countable sequence of mutually exclusive events \(A_1, A_2, \ldots\) satisfies
\[p(A_1 \cup A_2 \cup \cdots) = \sum_{i=1}^\infty P(A_i).\]
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Definitions: 1
Proofs: 2
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