How many ways are there to distribute n graded homeworks to n students such that none of them gets their own homework back?

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03-08-2017
Mathematics

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How many ways are there to distribute n graded homeworks to n students such that none of them gets their own homework back?

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mperemsky mperemsky · Answer 1 · 2017-08-03T07:31:13+02:00

mperemsky mperemsky

03-08-2017

Assume N students

Student 1 can get (n-1) papers
Student 2 can get (n-1) papers
Student 3 can get (n-1) papers
etc
Student N can get (n-1) papers

So for N students you can have N(n-1)

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