document.write( "Question 1180295: A push-button lock contains the digits 0 through 9. If the numbers may not be repeated, what is the probability you will correctly guess the 4 digit pass code. Type in answer as a decimal or fraction in lowest terms.\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #809923 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "There are  10*9*8*7 = 5040 possible codes of this type, and only one of them is correct.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Therefore, the probability to guess the correct code from the first attempt is\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "     = 0.000198413     ANSWER\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "Solved.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );