Box A contains 2 black and 3 red balls while box B contains 3 black and 4 red balls. Out of these two 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

Box A contains 2 black and 3 red balls while box B contains 3 black an

1.	Box A contains 2 black and 3 red balls while box B contains 3 black and 4 red balls. Out of these two 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.	\(\frac{{21}}{{31}}\)
B.	\(\frac{{12}}{{31}}\)
C.	\(\frac{{13}}{{41}}\)
D.	\(\frac{{10}}{{31}}\)
Answer» E.

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Box A contains 2 black and 3 red balls while box B contains 3 black and 4 red balls. Out of these two 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

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