Karyah7363 Karyah7363

13-05-2023
Mathematics

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I roll a fair die four times. Let X be the number of different outcomes that I see. (For example, if the die rolls are 5,3,6,6 then X = 3 because the different outcomes are 3, 5 and 6.) (a) Find the mean of X. (b) Find the variance of X.

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