Question 884462: Maria has taken five tests in each subject this semester.
Match each subject with the number of points the mean would change if the lowest grade is dropped.
(round to the nearest whole number)
Math: 49, 89, 77, 80, 91 A) 5
Science: 84, 75, 71, 71, 45 B) 6
Language Arts: 77, 58, 79, 85, 92 C) 4
History: 90, 66, 82, 85, 87 D) 7
Answer by JulietG(1812)   (Show Source):
You can put this solution on YOUR website! To find the arithmetic mean, add the scores together and divide by the number of exams.
Let's look at Math
(49 + 89 + 77 + 80 + 91)/5; mean is 77.2
If you drop the 49 (maybe a bad day for the test taker), you have:
(89+77+80+91)/4 (only four because you dropped the 5th test); mean is 84.25
The difference is 84.25 - 77.2, or 7.05.
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Do the others in the same fashion.
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