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Q.

A bag A contains 4 white and 3 black balls. Another bag B contains 5 white and 2 black.  A ball is drawn from each bag. The probability of getting balls of different colours is

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a

1349

b

2349

c

17

d

15

answer is B.

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Detailed Solution

P((W1∩B2)∪(B1∩W2)) =P(W1).P(B2)+P(B1).P(W2)                                             = 4727+3757                                             = 2349
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