(Solved by Humans)-I have four different sweaters. Every day I choose one of the
Question
- I have four different sweaters. Every day I choose one of the four sweaters at random to wear. Let X be the number of different sweaters I wore during a 5-day week. (For example, if my 5-day sweater sequence is (3, 2, 4, 4, 2) then X = 3 because that week I wore sweaters 2, 3 and 4.) Find the mean and variance of X.
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