# Discrete Marginal Distributions

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The joint mass function of a pair of discrete random variables computes probabilities regarding the location of the pair in the plane: . From this it is possible to derive the two marginal mass functions. The first marginal mass function computes probabilities regarding the location of the variable : ; and the second mass function computes probabilities regarding the second variable, : .

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Contributed by: Chris Boucher (March 2011)

Open content licensed under CC BY-NC-SA

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"Discrete Marginal Distributions"

http://demonstrations.wolfram.com/DiscreteMarginalDistributions/

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Published: March 7 2011