document.write( "Question 523469: The mean of five numbers is 10.If a new number is added then the mean becomes 12.Find the value of that number \n" ); document.write( "

Algebra.Com's Answer #347317 by oberobic(2304) $\"\"$ $\"About$

You can put this solution on YOUR website!
The sum of 5 numbers divided by 5 = 10, which is the average (i.e., the arithmetic mean).
\n" ); document.write( "So, the sum of the 5 numbers is 5*10 = 50.
\n" ); document.write( ".
\n" ); document.write( "When we add a number, the average is increased to 12.
\n" ); document.write( ".
\n" ); document.write( "(50+x)/6 = 12
\n" ); document.write( ".
\n" ); document.write( "50+x = 72
\n" ); document.write( ".
\n" ); document.write( "x = 22
\n" ); document.write( ".
\n" ); document.write( "Done. \n" ); document.write( "

\n" );