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probability

noun

prob·​a·​bil·​i·​ty ˌprä-bə-ˈbi-lə-tē How to pronounce probability (audio)
plural probabilities
1
a(1)
: the chance that a given event will occur
(2)
: the ratio of the number of outcomes in an exhaustive set of equally likely outcomes that produce a given event to the total number of possible outcomes
b
: a branch of mathematics concerned with the study of probabilities
2
: something (such as an event or circumstance) that is probable
3
: the quality or state of being probable
4
: a logical relation between statements such that evidence confirming one confirms the other to some degree

Example Sentences

There is a low probability that you will be chosen. There is some probability of rain tomorrow. With the dark clouds moving in, rain seems more like a probability than a possibility. The probability of a coin coming up heads is one out of every two tries.
Recent Examples on the Web Just yesterday, traders thought the probability of a three-quarters-percentage-point Fed rate hike at the September meeting was 77%. Matt Grossman, WSJ, 8 Sep. 2022 What is the probability former Vice President Pence testifies? CBS News, 4 Sep. 2022 West Palm Beach has a 12% probability of having a price decline of more than 10% and a 33% chance of having a price decline of less than 10%. Amber Bonefont, Sun Sentinel, 3 Sep. 2022 Coastal California has a 33% to 40% probability of above-normal temperatures. Los Angeles Times, 26 May 2022 So the probability of one word following another word in English is very, very different than their sequences in Spanish. Daniela Hernandez, WSJ, 2 Sep. 2022 High-performing tech teams thrive on diversity, which brings balance to thought processes to ensure the probability of failure is low. Expert Panel®, Forbes, 25 Aug. 2022 The site gives the Mystics a 30% win probability in Game 1 of the series. Jeremy Cluff, The Arizona Republic, 17 Aug. 2022 Usually the probability of this happening is vanishingly slim. Ahmed Almheiri, Scientific American, 17 Aug. 2022 See More

Word History

First Known Use

15th century, in the meaning defined at sense 3

Time Traveler
The first known use of probability was in the 15th century

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