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An urn contains 10 red marbles 10 white marbles and 8 blue marbles marbles A child randomly selects three without replacement from the urn Round

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An urn contains 10 red marbles 10 white marbles and 8 blue marbles marbles A child randomly selects three without replacement from the urn Round to four decimal places a Find the probability all three marbles are the same color b Find the probability that none of the three marbles are white

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