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OpenStudy (anonymous):
Please Help!! Will fan and give medal! :D There are 15 students in a social studies class. Two students will be selected to present their term projects today. In how many different orders can two students be selected? 840 105 420 210
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OpenStudy (anonymous):
i think its 15nCr2=105
OpenStudy (anonymous):
@eHoaX How did you solve that.. I'm really confused on this.
OpenStudy (anonymous):
are you taking statistics?
OpenStudy (anonymous):
@eHoaX Well I'm taking algebra 2 and it's part of it.
OpenStudy (anonymous):
So yes
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OpenStudy (anonymous):
@eHoaX
OpenStudy (anonymous):
since there are 15 students and the order in which they are picked doesnt matter you can use the function nCr where n is the total number and r is the number of people in a group.
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