document.write( "Question 1118861: How many four-letter permutations can be formed from the first seven letters of the alphabet? \n" ); document.write( "

Algebra.Com's Answer #734282 by ikleyn(52798) $\"\"$ $\"About$

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\n" ); document.write( "7*6*5*4 = 840 ways.\r
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document.write( "Any of 7 letter in the 1-st position.                  7 opportunities.\r\n" );
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document.write( "Any of remained 6 letters in the 2-nd position.        6 opportunities\r\n" );
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document.write( "Any of remained 5 letters in the 3-rd position.        5 opportunities.\r\n" );
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document.write( "Any of remained 4 letters in the 4-th position.        4 opportunities.\r\n" );
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