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Mathematics 15 Online
OpenStudy (anonymous):

Erik Allen repairs photocopy machines. According to his schedule, he needs to visit 5 different offices today. How many ways can Erik visit these offices and return to his headquarters? A. 120 B. 5 C. 20 D. 24

OpenStudy (anonymous):

B. 5

OpenStudy (unklerhaukus):

\[5!=5\times4\times3\times2\times2\times1=120=A.\]

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