Q.

One bag A contains 4 white and 5 black balls another bag B contains 5 white and 6 black balls. One bag is selected at random and a ball is drawn from it. The probability that it is white is

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a

89198

b

47198

c

17198

d

97198

answer is B.

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Detailed Solution

Bag  A:4W    5BBag  B:5W    6B

Probability of selecting bag=12

Required probability =12×49+12×511

=1244+4599

=89198

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