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The probability of an event is the reason we have to believe that it has taken place, or that it will take place.The measure of the probability of an event is the ratio of the number of cases favourable to that event, to the total number of cases favourable or contrary, and all equally possible.

The probability of an event is the reason we have to believe that it has taken place, or that it will take place.The measure of the probability of an event is the ratio of the number of cases favourable to that event, to the total number of cases favourable or contrary, and all equally possible.

Historical period not yet established

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Attribution & collection notes
Author or tradition
Siméon Denis Poisson
Attribution: attributed
Country attributed
Not established
A country attribution does not establish the earliest origin.
Historical period
Historical period not yet established
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Recorded source
Contributor-provided quotation collection

Supplied reference C; CSV row 165766; supplied attribution, independently unverified

A collection's publication date can be later than the words it records.