Q.
An urn A contains 8 black balls and 5 white balls. A second urn B contains 6 black and 7 white balls. The probability that a blind folded person in one draw shall obtain a white ball
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a
513
b
713
c
613
d
526
answer is C.
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Detailed Solution
P(W) =12(513)+12(713) = 5+726 = 613
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