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16 October, 18:49

There are 4 white marbles and 1 black marble in a bag. You draw two marbles, one after the other. Is the probability for both of the marbles to be white higher if you replace the first marble drawn or higher if you do not replace it?

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  1. 16 October, 19:03
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    The probability is higher if you replace the first marble ...
  2. 16 October, 19:31
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    The probability when not replacing is 4/5 x 3/4 = 3/5. Replacing is 4/5 x 4/5 = 16/25

    3/5=15/25 so replacing is higher
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Home » Mathematics » There are 4 white marbles and 1 black marble in a bag. You draw two marbles, one after the other. Is the probability for both of the marbles to be white higher if you replace the first marble drawn or higher if you do not replace it?
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