document.write( "Question 1043553: The mean of nine test scores is 61. If a score of 71 is added to the group of scores, what is the new mean?
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Algebra.Com's Answer #658689 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! mean=total/number \n" ); document.write( "61=total/9 \n" ); document.write( "total=9*61=549 \n" ); document.write( "add 71 to it and get 620. \n" ); document.write( "now mean is 620/10=62. \n" ); document.write( "This makes sense, because the score of 71 is higher than the mean, so the mean should rise, and indeed, it rises by exactly 1, because 71 is 10 more than 61 and there are 10 in the group now. \n" ); document.write( " |