SOLUTION: You have to pick 2 people to work with out of 15. How many different groups can you pick?

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Question 874610: You have to pick 2 people to work with out of 15. How many different groups can you pick?
Found 2 solutions by ewatrrr, jim_thompson5910:
Answer by ewatrrr(24785) About Me  (Show Source):
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
15 P 2 = (15!)/((15-2)!) = (15*14*13!)/(13!) = 15*14 = 210


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15 C 2 = ( 15 P 2 )/(2!) = 210/2 = 105


There are 105 ways to do this.