SOLUTION: There are three urns that each contain 10 balls. The first contains 3 white balls and 7 red balls, the second 8 white and 2 red, and the third all 10 white. Each urn has an equal p
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Question 529901: There are three urns that each contain 10 balls. The first contains 3 white balls and 7 red balls, the second 8 white and 2 red, and the third all 10 white. Each urn has an equal probability of being selected. After an urn is selected a ball is randomly drawn from this urn. If the ball drawn was white, find the probability that the third urn was selected. (Round your answer to three decimal places.)
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
there are 21 white balls
10 of them are in the 3rd urn
if a white ball is drawn, the probability is 10/21 that it came from the 3rd urn
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