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19 October, 14:52

Ou select a marble without looking and then put it back. If you do this 21 times, what is the best prediction possible for the number of times you will pick a marble that is not orange? There are 7 marbles in total, 2 orange marbles and 5 blue marbles

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  1. 19 October, 17:34
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    5/7 = non orange marbles

    ?/21 = chances to pick a non blue

    21/7 = 3

    5x 3 = 15

    15/21
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