document.write( "Question 823285: A number is selected at random from the numbers 3,5,5,7,7,7,9,9,9,9 the probability that the selected number is their average is
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Algebra.Com's Answer #495411 by Edwin McCravy(20060) $\"\"$ $\"About$

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document.write( "3+5+5+7+7+7+9+9+9+9 = 70\r\n" );
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document.write( "Their average is 70÷10 = 7\r\n" );
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document.write( "There are 3 ways to succeed by picking a seven out \r\n" );
document.write( "of 10 ways to pick a number.  So the probability is\r\n" );
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document.write( "Edwin

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