Probability mass function

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Notion

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Science and technology

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What Wikipedia says

In probability and statistics, a probability mass function (PMF), discrete probability density function, probability function, or frequency function is a function that gives the probability that a discrete random variable is exactly equal to some value.

Excerpt from the Wikipedia article “Probability mass function”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Oleg Alexandrov, Public domain, via Wikimedia Commons.