document.write( "Question 1053374: How many 3-element subsets does the set (A, B, C, D, E, F) have? \n" ); document.write( "
Algebra.Com's Answer #668635 by ikleyn(52787)\"\" \"About 
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\n" ); document.write( "How many 3-element subsets does the set (A, B, C, D, E, F) have?
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\n" ); document.write( "\n" ); document.write( "\"C%5B6%5D%5E3\" = \"%286%2A5%2A4%29%2F%281%2A2%2A3%29\" = 5*4 = 20.\r
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\n" ); document.write( "\n" ); document.write( "\"C%5B6%5D%5E3\" is the number of combinations of 6 objects taken 3 at a time.\r
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\n" ); document.write( "\n" ); document.write( "On combinations, see the lessons \r
\n" ); document.write( "\n" ); document.write( "    - Introduction to Combinations\r
\n" ); document.write( "\n" ); document.write( "    - PROOF of the formula on the number of Combinations\r
\n" ); document.write( "\n" ); document.write( "    - Problems on Combinations\r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-II in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook.\r
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