document.write( "Question 532343: Suppose you select a 3-digit number at random from the set of all positive 3-digit numbers. Find each probability. I just don't get this. \n" ); document.write( "

Algebra.Com's Answer #350813 by Edwin McCravy(20064) $\"\"$ $\"About$

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document.write( "The three digit numbers are the ones from 100 through 999 inclusive.\r\n" );
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document.write( "The problem is really like this:\r\n" );
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document.write( "Suppose there are a lot of cards in a box numbered from 100-999.  \r\n" );
document.write( "Somebody says \"Draw out card number (say) 731\".  What is the probability\r\n" );
document.write( "that he will reach in there blindly among those and actually draw card\r\n" );
document.write( "number 731 out of the box?\r\n" );
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document.write( "First we answer the question: How many of those cards are there in that\r\n" );
document.write( "bos?  Well there are 999 integers between 1 and 999, but the 99 \r\n" );
document.write( "integers from 1 through 99 have less than 3 digits, so we must subtract\r\n" );
document.write( "those 99 from 999. Therefore there are 999 - 99 = 900 3 digit numbers. \r\n" );
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document.write( "He hopes to draw card number 731.  However he has just 1 chance in 900\r\n" );
document.write( "of drawing it. So that means the probability is 1 out of 900 or .\r\n" );
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document.write( "(It doesn't have to be 731. It can be any 3-digit number, I just arbitrarily \r\n" );
document.write( "picked 731 as an illustration).\r\n" );
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document.write( "Edwin

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