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There are 3 black and 4 white balls in o...

There are 3 black and 4 white balls in one bag. 4 black and 3 white balls in the second bag. A die is rolled and the first bag is selected if it is 1 or 3 and the second bag for the rest. Find the probability of drawing a black ball from the bag thus selected.

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The correct Answer is:
`(11)/(21)`
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