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asked Dec 14, 2016 in Word Problem Answers by anonymous

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The probability of selecting a marble that is not black is 9/12=3/4.

The probability of selecting a white marble is 5/12 if all the marbles are available for selection.

If the black marbles are now withdrawn, leaving 9 marbles, then the probability of selecting a white marble becomes 5/9.

If the two probabilities are combined we have 3/4*5/9=5/12, the same as before.

answered Dec 14, 2016 by Rod Top Rated User (487,420 points)
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