document.write( "Question 874610: You have to pick 2 people to work with out of 15. How many different groups can you pick? \n" ); document.write( "
Algebra.Com's Answer #527596 by jim_thompson5910(35256)\"\" \"About 
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15 P 2 = (15!)/((15-2)!) = (15*14*13!)/(13!) = 15*14 = 210\r
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\n" ); document.write( "\n" ); document.write( "15 C 2 = ( 15 P 2 )/(2!) = 210/2 = 105\r
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\n" ); document.write( "\n" ); document.write( "There are 105 ways to do this.
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