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An urn contains 8 red marbles, 6 white marbles and 7 blue marbles. A child randomly selects three (without replacement) Find the probability all have the same color. Hint: Three distinct cases occur for the same color. Preview Find the probability that none is white. Preview

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Answer #1

P(all have same colour) = 8C3/21C3 + 6C3/21C3 + 7C3/21C3 = 0.0835

P(none is white) = 15C3/21C3 = 0.3421

                

                                                           

                

                                          

                  

              

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