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15-05-2017
Mathematics

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EXPAND » A bag contains 6 red marbles and 4 blue marbles. Ralph randomly draws a marble from the bag, notes its color, and then replaces the marble in the bag. He remixes the marbles and repeats the process until he draws a blue marble. What is the probability this takes Ralph more than 3 draws?

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Squidge Squidge

15-05-2017

the probability is 40%

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