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Box A contains 2 black and 3 red balls w...

Box A contains 2 black and 3 red balls while box B contains 3 black and 4 red balls. Out of the setwo boxes one is selected at random and the probability of choosing box A is double that of box B. If a red ball is drawn from the selected box, then the probability that it has come from box B is

A

`(21)/(41)`

B

`(10)/(31)`

C

`(12)/(31)`

D

`(13)/(41)`

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The correct Answer is:
B
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