Find the probability that everyone gets back his or her own name.

Mathematics
Tutor: None Selected Time limit: 1 Day


You and six friends play a game where each person writes down his or her name on a scrap of paper, and the names are randomly distributed back to each person. Find the probability that everyone gets back his or her own name.

a.  720

b.  1/5040

c.  1/720

d.  5,040

May 4th, 2015

b.  1/5040


the answer is b

May 4th, 2015

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