document.write( "Question 1006015: The average of 9 numbers is 43. When one of the numbers is subtracted the new mean is 47. What is the number \n" ); document.write( "

Algebra.Com's Answer #622217 by ikleyn(52850) $\"\"$ $\"About$

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\n" ); document.write( "I'd reformulate this problem as follows to avoid ambiguity:\r
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\n" ); document.write( "The average of 9 numbers is 43. When one of the numbers is $\"highlight%28removed%29\"$ the new mean is 47. What is the number?
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document.write( "Solution\r\n" );
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document.write( "Since the average of 9 numbers is 43, their sum is 9*43 = 387.\r\n" );
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document.write( "Since the average of remaining 8 numbers is 47, their sum is 47*8 = 376.\r\n" );
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document.write( "Hence, the removed number is 387 - 376 = 11.\r\n" );
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