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Each of the n urns contains 4 white and ...

Each of the `n` urns contains 4 white and 6 black balls. The `(n+1)` th urn contains 5 white and 5 black balls. One of the `n+1` urns is chosen at random and two balls are drawn from it without replacement. Both the balls turn out to be black. If the probability that the `(n+1)` th urn was chosen to draw the balls is 1/16, then find the value of `n` .

A

10

B

11

C

12

D

13

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The correct Answer is:
A
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MCGROW HILL PUBLICATION-PROBABILITY-Exercises (Level 1 Single Correct Answer)
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