document.write( "Question 974526: How many unique passwords can be created if every password must be five digits and can consist of either letters or numbers, without repeating passwords? \n" ); document.write( "
Algebra.Com's Answer #596392 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! There are 10 digits and 26 letters (in the English alphabet). I am assuming both letters and numbers can be used.\r \n" ); document.write( "\n" ); document.write( "There are 36 ways to choose the first, 35 the second, 34 the third, 33 the fourth, and 32 the fifth.\r \n" ); document.write( "\n" ); document.write( "45,239,040 ways\r \n" ); document.write( "\n" ); document.write( "I am assuming also that 0 and \"O\" are not an issue, \"l\" and \"1\" either.\r \n" ); document.write( "\n" ); document.write( "If letters or numbers only \n" ); document.write( "10*9*8*7*6=30,240 \n" ); document.write( "26*25*24*23*22=7,893,600\r \n" ); document.write( "\n" ); document.write( "That sum is 7,923,840 \n" ); document.write( " |