document.write( "Question 288815: a computer with an old processor locks up if more than4 applications run simultaneously.if the oner has 20 applications storedin his program file,how many different sets of 4 can he run,so that his computer does not lock up? \n" ); document.write( "

Algebra.Com's Answer #209308 by brucewill(101) $\"\"$ $\"About$

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In this case, since the computer can load the 4 programs in any sequence, it's not a permutation, rather, it is combinations. This is 20 things, 4 at a time.\r
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\n" ); document.write( "\n" ); document.write( " $\"highlight%284845%29\"$ ways to load the various combinations.\r
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