Mathematics, 15.01.2020 05:31 lizdominguez101

There are 30 red marbles and 10 black marbles in urn #1. you have 20 red and 20 black marbles in urn #2. randomly you pull a marble from the random urn and find that it is red.
what is the probability that it was pulled from urn #1?

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There are 30 red marbles and 10 black marbles in urn #1. you have 20 red and 20 black marbles in urn...