document.write( "Question 1025726: Please is there anyone that can help me with this problem. I have look at videos and read my book on this but still can not figure this out. I thought maybe by there being 26 letters in the alphabet and 10 numbers I could find it that way. Then I tried by it 7 characters long but that was still wrong.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "A computer password is required to be 7 characters long. How many passwords are possible if the password requires 1 letter(s) and 6 digits (numbers 0-9), where no repetition of any letter or digit is allowed? \r
\n" ); document.write( "\n" ); document.write( " There are possible passwords.
\n" ); document.write( "

Algebra.Com's Answer #641024 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
For each character of the 7-character password there can be
\n" ); document.write( "a different letter or number.
\n" ); document.write( "26 letters + 10 digits = 36
\n" ); document.write( "------------
\n" ); document.write( "The 1st character can be 36 possible
\n" ); document.write( "There are no repetitions, so there are
\n" ); document.write( "35 possible for 2nd character
\n" ); document.write( "-----------------------
\n" ); document.write( "This continues for 7 characters, so
\n" ); document.write( "\"+36%2A35%2A34%2A33%2A32%2A31%2A30+=+42072307200+\"
\n" ); document.write( "possible passwords
\n" ); document.write( "----------------
\n" ); document.write( "Hope I got it -you can get other opinions too
\n" ); document.write( "
\n" );