document.write( "Question 715814: A child has nine cards numbered 1 through 9. The child places three cards in a row to form a three-digit number. Find the probability that the number is larger than 600? \n" ); document.write( "

Algebra.Com's Answer #439632 by Edwin McCravy(20055) $\"\"$ $\"About$

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document.write( "The numerator of the probability is the number of ways she can\r\n" );
document.write( "succeed in picking a number greater than 600.\r\n" );
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document.write( "There are 4 ways she can pick the first digit as 6,7,8, or 9\r\n" );
document.write( "That leaves 8 ways she can pick the second digit.\r\n" );
document.write( "That leaves 7 ways she can pick the third digit.\r\n" );
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document.write( "So there are 4򊤋 ways she can pick a number larger than 600.\r\n" );
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document.write( "The denominator of the probability is the number of ways she can\r\n" );
document.write( "pick any number whether smaller or larger than 600.\r\n" );
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document.write( "There are 9 way she can pick the first digit.\r\n" );
document.write( "That leaves 8 ways she can pick the second digit.\r\n" );
document.write( "That leaves 7 ways she can pick the third digit.\r\n" );
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document.write( "So there are 9򊤋 ways she can pick any nunber (whether smaller \r\n" );
document.write( "or larger than 600).\r\n" );
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document.write( "So the probability that she will succeed in picking a number greater\r\n" );
document.write( "than 600 is the fraction\r\n" );
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document.write( "      =  = \r\n" );
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document.write( "Edwin

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