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The contents of the three urns are given below Urn 1 - 4 black balls, 4 red balls Urn 2 - 3 black balls, 5

The contents of the three urns are given below

Urn 1 - 4 black balls, 4 red balls

Urn 2 - 3 black balls, 5 red balls

Urn 3 - 5 black balls, 3 red balls

A n urn is chosen at random and a ball is drawn from it. If the chosen ball is red find the probability it is from urn 3.

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