Colored balls in boxes
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There are three boxes, one containing two black balls, another containing two white balls, and another containing one black and one white ball. You select a random ball from a random box and you find you selected a white ball. What is the probability that the other ball in the same box is also white?
Best answer
((1/3)*1) / ( ((1/3)*0) + ((1/3)*1) + ((1/3)*(1/2)) ) = 2/3
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