document.write( "Question 1129016: A computer system requires you to have a three digit access code. It cannot
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Algebra.Com's Answer #745553 by Edwin McCravy(20060) $\"\"$ $\"About$

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A computer system requires you to have a three digit access code. It cannot
\n" ); document.write( "start with zero. What is the probability that your code is 123 or 132? (Round to four decimal places.)
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document.write( "That's 2 possible ways out of the integers 100-999.\r\n" );
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document.write( "We want to find out how many integers there are between 100 and 999,\r\n" );
document.write( "inclusive:\r\n" );
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document.write( "There are 999 numbers 1-999, incusive\r\n" );
document.write( "There are 99 numbers 1-99, inclusive that we don't want to count because\r\n" );
document.write( "they are not 3-digit numbers.\r\n" );
document.write( "So there are 999-99 = 900 numbers between 100 and 999 inclusive.\r\n" );
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document.write( "So the answer is\r\n" );
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document.write( "2 possible ways out of 900 or 2/900 which reduces to 1/450, and as\r\n" );
document.write( "a decimal to 4 decimal places is 0.0022\r\n" );
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document.write( "Edwin

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