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Does anyone know how to calculate the distribution of $$X/(X+Y)$$ X ~ G(p,a)

Y~G(p,b)

G is gamma distribution

A. Othmane
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  • https://math.stackexchange.com/questions/2795168/beta-distribution-as-ratio-involving-gamma-distributions – Ben Bolker Jul 26 '19 at 02:37
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    The answer depends on the *joint* distribution, not just the margins. Presuming you mean for them to be independent, the question has been asked and answered multiple times already. – Glen_b Jul 26 '19 at 02:58

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