If two balls are randomly selected from a green urn containing 5 black and 5 white balls and placed into a yellow urn initially containing 5 black and 3 white balls. What is the probability that the yellow urn will contain an equal number of black and white balls after the change?
Can someone please answer this question.....
To have equal number of black and white balls, the yellow urn must have 5 black and 5 white balls. So the balls we select out of the green urn must be both white.
Probability (first ball is white) = 5/10
Probability(second ball is white) = 4/9
Probability (both balls are white) = (5/10)*(4/9) = 2/9
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