document.write( "Question 1099807: A credit card number has 16 digits between 0 and 9 inclusive.If only 100 million numbers are valid, what is the probability that a number that is entered ramdomly is valid? \n" ); document.write( "

Algebra.Com's Answer #714295 by Edwin McCravy(20055) $\"\"$ $\"About$

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document.write( "The smallest credit card number is \r\n" );
document.write( " 0000000000000000 and the largest is \r\n" );
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document.write( " 9999999999999999.  From 1 to \r\n" );
document.write( " 9999999999999999 is \r\n" );
document.write( " 9999999999999999 numbers and \r\n" );
document.write( " 0000000000000000 makes it\r\n" );
document.write( "10000000000000000\r\n" );
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document.write( "100 million valid numbers is \r\n" );
document.write( "100000000 so the probability is\r\n" );
document.write( "100000000/10000000000000000 which reduces to\r\n" );
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document.write( "1/100000000\r\n" );
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document.write( "Edwin

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