SOLUTION: Carol has earned 90, 95,85, 82, 75 on 5 test. Max. 100 points. She wants average score of exactly 85 points on all 6 test. How many points must she earn on test 6 to have an avera
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-> SOLUTION: Carol has earned 90, 95,85, 82, 75 on 5 test. Max. 100 points. She wants average score of exactly 85 points on all 6 test. How many points must she earn on test 6 to have an avera
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Question 248041: Carol has earned 90, 95,85, 82, 75 on 5 test. Max. 100 points. She wants average score of exactly 85 points on all 6 test. How many points must she earn on test 6 to have an average of 85 points. Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! let x= test 6 score
90, 95,85, 82, 75,x
add all test scores together including x and divide by 6
set it equal to 85
( 90+ 95+85+ 82+ 75+x)/6=85
BTW Carol's average now is 85.4 so she will have to have less than that to have exactly 85
