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# What is cumulative probability?

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Cumulative probability is used in statistics to determine the probability of a particular outcome given the previous outcomes of the same problem with the same variables. For example, cumulative probability can be used to determine the probability that a coin flipped 10 times comes up twice as tails.

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Cumulative probability is applied mathematically through the cumulative distribution function. The graph of this function shows that cumulative probability never decreases and always moves rightward on an x/y coordinate plane. The cumulative distribution function is used to derive statistical functions for tail distribution or exceedance, folded cumulative distribution, and inverse distribution function. A practical use of cumulative probability can be seen in graphs of population distribution.

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