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OpenStudy (anonymous):
In how many ways can 9 instructors be assigned to seven sections of a course in mathematics?
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OpenStudy (mathmate):
Assuming only one instructor per course, and that all course must have instructors. We are choosing 7 instructors out of 9 to teach 7 (different) course sections. For the first section, there are 9 choices, 8 for the second, and so on until the 7th section where there are 3 choices. The total number of ways is therefore 9*8*7*6*....3 =9!/2!
OpenStudy (anonymous):
ok thats what I was thinkn!
OpenStudy (anonymous):
thanks!
OpenStudy (mathmate):
You're welcome! :)
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