document.write( "Question 1176342: carl is choosing a four character password for his cell phone. The password can contain letters, and digits only, and can“t include repeating characters. How many passwords are possible? And permutation, or combination? \n" ); document.write( "
Algebra.Com's Answer #803047 by CubeyThePenguin(3113)\"\" \"About 
You can put this solution on YOUR website!
26 letter of the alphabet + 10 numbers = 36 characters overall\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "order matters --> permutation\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "36 * 35 * 34 * 33 = 1,413,720
\n" ); document.write( "
\n" );