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If from each of the three boxes containing 3 whiter and 1 black, 2 white and 2 black, 1 white and 3 black ball, one bal is drawn at random, then the probability that 2 white and 1 black ball will be drawn is `1//3` b. `1//6` c. `1//2` d. 1/4

A

`13/32`

B

`1/4`

C

`1/32`

D

`3/16`

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A
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