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Definition of Probability


  1. The quality or state of being probable; appearance of reality or truth; reasonable ground of presumption; likelihood.
  2. That which is or appears probable; anything that has the appearance of reality or truth.
  3. Likelihood of the occurrence of any event in the doctrine of chances, or the ratio of the number of favorable chances to the whole number of chances, favorable and unfavorable. See 1st Chance, n., 5.

Probability Quotations

The probability that we may fail in the struggle ought not to deter us from the support of a cause we believe to be just.
Abraham Lincoln

The consequences of an act affect the probability of its occurring again.
B. F. Skinner

The 50-50-90 rule: Anytime you have a 50-50 chance of getting something right, there's a 90% probability you'll get it wrong.
Andy Rooney

Probability is expectation founded upon partial knowledge. A perfect acquaintance with all the circumstances affecting the occurrence of an event would change expectation into certainty, and leave nether room nor demand for a theory of probabilities.
George Boole

Medicine is a science of uncertainty and an art of probability.
William Osler
More "Probability" Quotations

Probability Translations

probability in German is Wahrscheinlichkeit, wahrscheinlich
probability in Italian is verosimiglianza
probability in Spanish is probabilidad, apariencia
probability in Swedish is sannolikhet

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