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Q.

When two balls are drawn from a bag containing 2 white, 4 red and 6 black balls the chance for both of them to be red is

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a

111

b

611

c

311

d

412

answer is A.

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Detailed Solution

n(A)=C2   4, n(S)=C2   12             P(A)=C2   4C2   12=111
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When two balls are drawn from a bag containing 2 white, 4 red and 6 black balls the chance for both of them to be red is