document.write( "Question 1035821: The arithmetic mean of 25 scores on a 100-point test is 87, and the arithmetic mean of 21 of these scores is 85. What is the largest possible difference between any two of the other four scores?
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Algebra.Com's Answer #650538 by robertb(5830)![]() ![]() You can put this solution on YOUR website! The 25 scores with a mean of 87 ==> the sum of the 25 scores is 2175. \n" ); document.write( "The 21 of the 25 scores having a mean of 85 ==> the sum of the 21 scores is 1785.\r \n" ); document.write( "\n" ); document.write( "==> Four of the scores had a sum of 2175 - 1785 = 390. \n" ); document.write( "The mean of these four scores is 97.5.\r \n" ); document.write( "\n" ); document.write( "The most a score can vary from 97.5 is 2.5 points. (Assuming that scoring more than 100 is not allowed.)\r \n" ); document.write( "\n" ); document.write( "==> The lowest possible score from the fours scores is 95, while the highest possible is 100.\r \n" ); document.write( "\n" ); document.write( "==> The largest possible difference between any two of the other four scores is 5. \n" ); document.write( " |