ormondegap2z4j3 ormondegap2z4j3

08-02-2018
Mathematics

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How many one-to-one correspondences are there between two sets with 5 elements each?

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vremigi vremigi

08-02-2018

1st element can be matched with 5
2nd element can be matched with 4
3rd element can be matched with 3
etc.
Total number of correspondences = 5*4*3*2*1 = 120

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