Posted by **AngelG** on Thursday, October 11, 2012 at 6:04am.

An urn A contains 6 white balls and 7 black balls. And urn B contains 8 white balls and 6 black balls. A person draws a ball at random from one of the two urns. It turns out to be black. What is probability that the ball was drawn from urn A?

(A) 7/14

(B) 49/88

(C) 39/88

(D) None of the above

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