probability theory

noun, Mathematics, Statistics.

the theory of analyzing and making statements concerning the probability of the occurrence of uncertain events.

Compare probability (def 4).

Origin of probability theory

1830-1840

First recorded in 1830-40

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Historical Examples

He also introduced the concept of mathematical expectation into probability theory.

Our Legal Heritage, 5th Ed. S. A. Reilly

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