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屏幕快照 2019-12-11 下午6.01.22.pngplease answer this, much thx

屏幕快照 2019-12-11 下午6.01.22.png

5. Recall that a permutation is a one-to-one map of a set {a1, a2, . ..; a, } onto
itself. Consider a random permutation of 5 elements, in which each permutation
has exactly the same probability to occur. Find the probability that the random
permutation has no fixed points.

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The probability is 3 0 1 1 . This problem can be... View the full answer

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