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28 January, 15:35

A bag contains 3 white marbles and 6 black marbles. You pick out a marble, record its color, and put the marble back in the bag. If you repeat this process 36 times, how many times would you expect to remeve a black marble from the bag?

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  1. 28 January, 15:58
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    You would expect to 24 times.

    The bag is made up of 2/3 black marbles and thus you would expect 2/3 of the final to be black.
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