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A mapping is select at random from the set of all the mappings
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A mapping is select at random from the set of all the mappings of the set into itself. Find the probability that the mapping selected is an injection.

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A mapping is select at random from the set of all the mappings of the set into itself. Find the probability that the mapping selected is an injection.
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Question Text
A mapping is select at random from the set of all the mappings of the set into itself. Find the probability that the mapping selected is an injection.