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Mathematics 17 Online
OpenStudy (bloomlocke367):

There are 10 students participating in a spelling bee. In how many ways can the students who go first and second in the bee be chosen?

OpenStudy (bloomlocke367):

do I just do 10! ? So would it be 3628800? @iGreen @Unanimoose

OpenStudy (igreen):

Just multiply 10 * 9.

OpenStudy (bloomlocke367):

why 10*9?

OpenStudy (bloomlocke367):

and not 10*9*8*7*6*5*4*3*2*1?

OpenStudy (igreen):

10 ways to choose the first student, and only 9 ways to choose the 2nd student, so we multiply 10 * 9.

OpenStudy (bloomlocke367):

ohhhh. that makes sense. Can you help with another?

OpenStudy (igreen):

Maybe, go ahead and post it.

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