document.write( "Question 762118: 1. How many permutation of 5 different digits can be arrange from the numbers 0 to 20
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Algebra.Com's Answer #463711 by Edwin McCravy(20059)\"\" \"About 
You can put this solution on YOUR website!

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document.write( "There are 21 elements in this set\r\n" );
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document.write( "{0,1,2,3,4,5,6,7,8,9,10,1,12,13,14,15,16,17,18,19,20}\r\n" );
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document.write( "P(21,5) = 21·20·19·18·17 = 2441880\r\n" );
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\n" ); document.write( "2. How many permutation of 3 different letters can be arrange from the word “NOTEBOOK” (repetition is not allowed)
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document.write( "That's the set {N,O,T,E,B,K} which contains 6 elements.\r\n" );
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document.write( "P(6,3) = 6·5·4 = 120.\r\n" );
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\n" ); document.write( "3. A password consists of 4 characters, the two characters is made of alpha characters from A-E and the other two characters is made from F-G. How many arrangement of character can be made?
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document.write( "Choose two from A-E in C(5,2)=10 ways, and from F-G in C(2,2) = 1 way.  That's\r\n" );
document.write( "10 ways. \r\n" );
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document.write( "4.	How many words can be made from the word “KEYBOARD” with any length?\r\n" );
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document.write( "1-letter words = P(8,1) = 8\r\n" );
document.write( "2-letter words = P(8,2) = 8·7 = 56\r\n" );
document.write( "3-letter words = P(8,3) = 8·7·6 = 336\r\n" );
document.write( "4-letter words = P(8,4) = 8·7·6·5 = 1680\r\n" );
document.write( "5-letter words = P(8,5) = 8·7·6·5·4 = 6720\r\n" );
document.write( "6-letter words = P(8,6) = 8·7·6·5·4·3 = 20160\r\n" );
document.write( "7-letter words = P(8,7) = 8·7·6·5·4·3·2 = 40320\r\n" );
document.write( "8-letter words = P(8,8) = 8·7·6·5·4·3·2·1 = 40320\r\n" );
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document.write( "Add those up = 109600\r\n" );
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document.write( "Edwin
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