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#Question id: 14700


One mapping is selected at random from all the mappings from the set S = {1,2,3,...n} into itself. The probability that the selected mapping is one to one is

#Unit 13. Methods in Biology
  1. 1/nn
  2. 1/n!
  3. n/n!
  4. none of these

Answer:- Option(s): 4


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