Mathematics · Probability
One mapping (function) is selected at random from all the mappings of the set A = {1, 2, 3, ..., n} into itself. The probability that the mapping selected is one-to-one is
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11nn
- 21(n)!
- 3(n - 1)!nn - 1✓
- 4None of these
Correct answer
(n - 1)!nn - 1
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