document.write( "Question 1044103: How many 4-letter combinations can be made from the word MATHLOVER if...
\n" ); document.write( "A.) no repetition of letters is permitted:______
\n" ); document.write( "B.) letters may be repeated:_________
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Algebra.Com's Answer #659351 by MathLover1(20849)\"\" \"About 
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\n" ); document.write( "There are \"9\" different letters in the word MATHLOVER.\r
\n" ); document.write( "\n" ); document.write( "a) So we need \"4\" letters from the \"9\" letters in 'mathlover' and no repetition of letters is permitted.
\n" ); document.write( "If you choose the first letter you have \"9\" possibilities, for the 2nd you have \"8\" .. and so forth\r
\n" ); document.write( "\n" ); document.write( "Therefore:
\n" ); document.write( "Number of combinations = \"9%2A8%2A7%2A6+=3024\"\r
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\n" ); document.write( "\n" ); document.write( "b) You see you can do the same but if things might be repeated you have \"9\" possibilities every time;
\n" ); document.write( "therefore number of combinations = \"9%2A9%2A9%2A9+=+9%5E4+=+6561\"
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