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3 March, 11:28

If you role a number cube 12 times about how many times do you expect to role a number less than 5

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  1. 3 March, 12:20
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    I guess this cube is a dye & it has six faces numbered from 1 to 6.

    If so the expected value is the probability x number of times:

    P (getting 1 or 2 or 3 or 4) = 4/6 = 2/3

    The number of times = 10, hence the expected value is 12x (2/3) = 8 times
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