document.write( "Question 619192: 1. RANK the following four rules from MOST combinations to LEAST combinations. Explain how you know. (Intuition is good, but math is better!)\r
\n" ); document.write( "\n" ); document.write( "Password must be 8 lowercase letters. No numbers.
\n" ); document.write( "Password must be 6 letters but they may be lowercase or uppercase. No numbers.
\n" ); document.write( "Password must be 4 characters - either uppercase, lowercase, or numbers.
\n" ); document.write( "Password must be 10 letters, but each character must alternate between an UPPERCASE letter and a number.\r
\n" ); document.write( "\n" ); document.write( "2. How many ways are there to rank the options? \n" ); document.write( "
Algebra.Com's Answer #389456 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
1. RANK the following four rules from MOST combinations to LEAST combinations. Explain how you know. (Intuition is good, but math is better!)\r
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document.write( "There are 26 lower case letters, we choose 8, so\r\n" );
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document.write( "C(26,8) = 1562274\r\n" );
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\n" ); document.write( "Password must be 6 letters but they may be lowercase or uppercase. No numbers.
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document.write( "There are 26 lower case letters amd 26 upper case letters.  That's 52 letters.\r\n" );
document.write( "We choss 6, so\r\n" );
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document.write( "C(52,6) = 20358520 \r\n" );
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\n" ); document.write( "Password must be 4 characters - either uppercase, lowercase, or numbers.
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document.write( "There are 52 upper and lower case letters plus 10 digits, so that's 62\r\n" );
document.write( "total characters.  We choose 4, so\r\n" );
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document.write( "C(62,6) = 61474519\r\n" );
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\n" ); document.write( "Password must be 10 letters, but each character must alternate between an UPPERCASE letter and a number.
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document.write( "Examples: P6U2P5R6H7, 8E6K9K0P4D\r\n" );
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document.write( "Passwords which begin with an upper case letter:\r\n" );
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document.write( "26*10*26*10*26*10*26*10*26*10 = 1188137600000\r\n" );
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document.write( "Passwords which begin with a digit:\r\n" );
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document.write( "10*26*10*26*10*26*10*26*10*26 = 1188137600000\r\n" );
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document.write( "That's a total of 1188137600000 + 1188137600000 = 2376275200000\r\n" );
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\n" ); document.write( "2. How many ways are there to rank the options?
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document.write( "The way the problem lists them is from LEAST to MOST,\r\n" );
document.write( "so reverse them.\r\n" );
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document.write( "Edwin
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