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Probability mass function

{title2=$p_X(x)=\sum_y p_{X,Y}(x,y)$}

A <probability mass function> obtained by summing a <joint probability mass function> over the unretained coordinates. Nonnegative summands ensure that iterated sums are well defined.

Marginal probability mass function

Past exam of the mathematics course of the University of Oxford / 2023 / Prelims / Mathematics III / 4 / a / i / Solution

Past exam of the mathematics course of the University of Oxford / Undated / Prelims / Mathematics III resit / 4 / b / ii / Solution

Past exam of the mathematics course of the University of Oxford / Undated / Prelims / Mathematics III resit / 4 / c / iii / Solution

Past exam of the mathematics course of the University of Oxford / Undated / Prelims / Mathematics III resit / 4 / c / ii / Solution

Marginal probability mass function ( $p_{X} (x) = \sum_{y} p_{X, Y} (x, y)$ )

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Marginal probability mass function (pX​(x)=∑y​pX,Y​(x,y))

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Marginal probability mass function ( $p_{X} (x) = \sum_{y} p_{X, Y} (x, y)$ )

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