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Number of Functions Possible from Set A to Set B

The number of...

Question

The number of bijections of a set consisting of 10 elements to itself is :

∠ 10

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∠ 10 - 10

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∠ 9 + 10

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∠ 10 - 2

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Solution

The correct option is A $∠ 10$
Bijection from set – A to itself means permutation.
No. of permutations = $∠ 10$

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