document.write( "Question 1194338: 3.In how many ways can the letters in the word TEXAS be arranged if
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Algebra.Com's Answer #826521 by ikleyn(52790)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "(a)  5! = 5*4*3*2*1 = 120 arrangements (permutations).\r\n" );
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document.write( "(b)  5*4 = 20 2-letter words, if 2 letters are used at a time.\r\n" );
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document.write( "(c)  5*4*3*2 = 120 4-letter words, if 4 letters are used at a time.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Since the order is important,  this problem is on  PERMUTATIONS.\r
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\n" ); document.write( "\n" ); document.write( "On  Permutations,  see introductory lessons \r
\n" ); document.write( "\n" ); document.write( "    - Introduction to Permutations\r
\n" ); document.write( "\n" ); document.write( "    - PROOF of the formula on the number of Permutations\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
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\n" ); document.write( "\n" ); document.write( "The referred lessons are 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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