document.write( "Question 1115873: You are making a new password. It must consist of 4 letters and 2 numbers. How many passwords can be created if no numbers or letters are repeated?\r
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document.write( "My work :\r
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document.write( "26*25*24*23*10*9 = 32292000
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Algebra.Com's Answer #730717 by ikleyn(52798)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "Any of 26 letters and/or 10 digits can be in the 1-st position: 26+10 = 36 opportunities.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Any of remaining 26+10-1 = 35 symbols can be in the 2-nd position: 35 opportunities.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( ". . . . And so on . . . \r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "In all, 36*35*34*33*32*30 = 36P6 different passwords are possible, satisfying given conditions.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |