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A comment on How to become a Bayesian (2016).

Re:How to become a Bayesian (2016) by woodandsteel on Wednesday July 08, 2020 @05:21PM (#23774374)
About 40 years ago I was reading a business mathematics book and ran across a section that, as I recall, started out with a basic probabilities equation and derived the basic Bayesian equation in one step.

Am I remembering this right? If so could someone post it?

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Re:How to become a Bayesian (2016) by hgoury on Thursday July 09, 2020 @03:44AM (#23777886)
By definition: p(A|B) = p(A,B) / p(B) (1)

With the same definition, switching A and B roles, we have p(A, B) = p(B|A) p(A) (2)

Plug (2) into (1) and you have Bayes rule.

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Re:How to become a Bayesian (2016) by woodandsteel on Thursday July 09, 2020 @03:27PM (#23784048)
Thank you for the explanation.
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