document.write( "Question 1085261: 2 bananas are to be selected from a group of 8. In how many ways can this be done? \n" ); document.write( "
Algebra.Com's Answer #699327 by jim_thompson5910(35256)\"\" \"About 
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We have two slots to fill: Slot A, Slot B\r
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\n" ); document.write( "\n" ); document.write( "There are 8 choices for slot A\r
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\n" ); document.write( "\n" ); document.write( "There are 7 choices for slot B\r
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\n" ); document.write( "\n" ); document.write( "There are 8*7 = 56 permutations possible. This would be the answer if order mattered.\r
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\n" ); document.write( "\n" ); document.write( "Since order does not matter, we must divide that result by 2 to get 56/2 = 28\r
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\n" ); document.write( "\n" ); document.write( "We divide by two to correct for double-counting.\r
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\n" ); document.write( "\n" ); document.write( "The final answer is 28\r
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\n" ); document.write( "\n" ); document.write( "Side Note: we can use the combination formula to get\r
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\n" ); document.write( "\n" ); document.write( "n C r = (n!)/(r!*(n-r)!)
\n" ); document.write( "8 C 2 = (8!)/(2!*(8-2)!) ... plug in n = 8 and r = 2
\n" ); document.write( "8 C 2 = (8!)/(2!*6!)
\n" ); document.write( "8 C 2 = (8*7*6!)/(2!*6!)
\n" ); document.write( "8 C 2 = (8*7)/(2!)
\n" ); document.write( "8 C 2 = (8*7)/(2*1)
\n" ); document.write( "8 C 2 = 56/2
\n" ); document.write( "8 C 2 = 28\r
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\n" ); document.write( "\n" ); document.write( "which is an alternative way to get the same answer
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