document.write( "Question 1190923: Jorge’s average score on the first 3 tests was 88. His average score on the next 5 tests was 84. What was Jorge’s
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document.write( "average score on all 8 tests? \n" );
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Algebra.Com's Answer #822676 by greenestamps(13200)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "In a problem about averages where all the numbers are close together, you can often find the answer quickly by using an \"over and under\" analysis. \n" ); document.write( "In this case, if the average on the first 3 tests had also been 84, then the average on all 8 tests would be 84. \n" ); document.write( "However, he scored an average of 3 points above 84 on those first 3 tests. That's a total \"over\" of 4*3=12 points. \n" ); document.write( "12 \"over\" points averaged over the 8 tests is an average \"over\" of 12/8=1.5. \n" ); document.write( "So his average is 84+1.5=85.5. \n" ); document.write( " \n" ); document.write( " |