document.write( "Question 1154794: the mean of 3 numbers is a. given that the 1st and 2nd numbers stay the same and the 3rd number is decreased by 9, what is the new mean in terms of a? \n" ); document.write( "

Algebra.Com's Answer #777272 by ikleyn(52914) $\"\"$ $\"About$

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document.write( "Let the numbers be \"x\", \"y\" and \"z\".\r\n" );
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document.write( "We are given that   = a.\r\n" );
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document.write( "Hence,  x + y + z = 3a.\r\n" );
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document.write( "The new mean is    =  =  = a - 3.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "On Average and Mean see the lessons \r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on average scores, weight, height and temperature\r
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\n" ); document.write( "\n" ); document.write( "    - Solved problems on average age \r
\n" ); document.write( "\n" ); document.write( "    - Miscellaneous problems on average values \r
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\n" ); document.write( "\n" ); document.write( "Consider these lessons as your textbook, handbook, tutorials and (free of charge) home teacher.\r
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