document.write( "Question 1177599: Supposed your computer password must contain four characters, must begin with a letter, and may contain digits and letters only. How many different passwords can you create. (Note that in a password, upper case letters are different from lower case letters.) \n" ); document.write( "

Algebra.Com's Answer #806680 by ikleyn(52787) $\"\"$ $\"About$

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document.write( "At the beginning position, we have  26^2 = 52 opportunities with the letters;\r\n" );
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document.write( "and at each of the other positions we have 52 + 10 opportunities.\r\n" );
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document.write( "So, in all, there are  52*62^3 = 12393056 different passwords.\r\n" );
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