SOLUTION: Box A contains 5 red balls and 4 white balls. Box B contains 6 red balls and 5 white balls. If one ball is selected at random without looking at the boxes and is found red, what is

SOLUTION: Box A contains 5 red balls and 4 white balls. Box B contains 6 red balls and 5 white balls. If one ball is selected at random without looking at the boxes and is found red, what is

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Question 1194852: Box A contains 5 red balls and 4 white balls. Box B contains 6 red balls and 5 white balls. If one ball is selected at random without looking at the boxes and is found red, what is the probability it came from box A?
Answer by shlomitg(8) (Show Source): You can put this solution on YOUR website!
The probability is 5/11. Once you picked a red ball randomely, A box has 5 and B has six, so it's 5/11 probability that you chose a ball from A.
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