document.write( "Question 1192086: Given the digits 1,2,4,6,8 and 9, how many four - digit numbers can be formed if repetition is not allowed.
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Algebra.Com's Answer #823988 by ikleyn(52787) $\"\"$ $\"About$

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document.write( "Any of 6 given digits in the left-most position, giving 6 options;\r\n" );
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document.write( "any of remaining 5 digits in the next position, giving 5 options;\r\n" );
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document.write( "any of remaining 4 digits in the next position, giving 4 options;\r\n" );
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document.write( "any of remaining 3 digits in the last position, giving 3 options.\r\n" );
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document.write( "The ANSWER is the product of the number of options in each position\r\n" );
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document.write( "    6*5*4*3 = 360 different numbers.\r\n" );
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\n" ); document.write( "\n" ); document.write( "See the lesson\r
\n" ); document.write( "\n" ); document.write( " - Special type permutations problems \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 lesson is the part of this online textbook under the topic \"Combinatorics: Combinations and permutations\". \r
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\n" ); document.write( "\n" ); document.write( "Save the link to this textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-II
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