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March 28, 2017

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there are 9 blue marbles, 4 black marbles, 5 white marbles and 6 red marbles. If the probability of drawing a blue marble is now 1/3, how many of the 6 marbles removed were blue?

  • Math - ,

    Short answer: 3.

    9+4+5+6 = 24
    24-6 = 18
    18/3 = 6
    9-6 = 3 Ans.

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