document.write( "Question 224818: How many ways can three letters be chosen from the letters A,B,C,D, and E? \n" ); document.write( "
Algebra.Com's Answer #167944 by Alan3354(69443)\"\" \"About 
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How many ways can three letters be chosen from the letters A,B,C,D, and E
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\n" ); document.write( "If repeats are allowed, eg AAA, it's 5*5*5 = 125
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\n" ); document.write( "If letters can't be reused, it's 5*4*3 = 60
\n" ); document.write( "The 1st letter is 1 of 5, then 1/4, then 1/3.
\n" ); document.write( "This is 5!/(5-3)! = 120/2 = 60
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\n" ); document.write( "If order doesn't matter, ie, if ABC is the same as ACB, then it's
\n" ); document.write( "5*4*3/(3*2*1) = 10
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