document.write( "Question 873681: A computer password is to consist of four alphanumeric characters with no repeats. How many such passwords are there? How many are there if the letter O and the number 0 are excluded to avoid confusion? \n" ); document.write( "

Algebra.Com's Answer #527019 by ewatrrr(24785) $\"\"$ $\"About$

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26 Letters, 10 Numbers
\n" ); document.write( "Choosing four alphanumeric characters with no repeats...How many are There?
\n" ); document.write( "N
\n" ); document.write( "0 $\"26C4%29\"$
\n" ); document.write( "1 $\"%2826C3%29%2810C1%29\"$
\n" ); document.write( "2 $\"%2826C2%29%2810C2%29\"$
\n" ); document.write( "3 $\"%2826C1%29%2810C3%29\"$
\n" ); document.write( "4 $\"%2826C0%29%2810C4%29\"$
\n" ); document.write( "25 Letters, 9 Numbers
\n" ); document.write( "0 $\"25C4%29\"$
\n" ); document.write( "1 $\"%2825C3%29%289C1%29\"$
\n" ); document.write( "2 $\"%2825C2%29%289C2%29\"$
\n" ); document.write( "3 $\"%2825C1%29%289C3%29\"$
\n" ); document.write( "4 $\"%2825C0%29%289C4%29\"$
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