A ball is drawn from an urn containing 3 white and 3 black balls. After the ball is drawn, it is then replaced and another ball is drawn. This goes on indefinitely. What is the probability that, of the first 4 balls drawn, exactly 2 are white?
Added by Ramon C.
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Since there are 3 white balls and 6 total balls, the probability of drawing a white ball is 3/6 = 1/2. Show more…
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