document.write( "Question 260205: The average(arithmetic mean) of nine numbers is 9. When a tenth number is added the average of the ten numbers is also 9. What is the tenth number ?\r
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document.write( "a) 9/10 b) 10/9 c) 9 d) 10 \n" );
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Algebra.Com's Answer #191679 by edjones(8007)![]() ![]() You can put this solution on YOUR website! 9 \n" ); document.write( " |