An urn contains 9 red marbles, 10 white marbles, and 10 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. Hint: Three distinct cases occur for the same color. b. Find the probability that none of the three marbles are white. | Enter a mathematical expression [more..]

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