Mathematics, 30.10.2020 22:20 bqg464

An Urn contains two white marbles and one black marble. A marble is drawn from the Urn without replacement and put aside without my seeing it. Then a second marble is drawn, and it is white. What is the probability that the unknown removed marble is white, and what is the probability that it is black?

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An Urn contains two white marbles and one black marble. A marble is drawn from the Urn without repla...

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