Question: Please help meeeee thanks i will leave you good fedeedbacl i appreciate you!!! Suppose a room is filled with 4 types of urns, which are

Please help meeeee thanks i will leave you good fedeedbacl i appreciate you!!!

Suppose a room is filled with 4 types of urns, which are equally common. The 4 types are as follows: Type A urns have 1 black marbles, 2 white . Type B urns have 2 black marbles, 4 white . Type C urns have 3 black marbles, 6 white . Type D urns have 4 black marbles, 8 white Suppose we select an urn at random and draw two marbles with replacement. What is the probability it's a Type B urn if both draws are black

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