Question

Jessica has five exam scores of 90, 85, 71, 68, and 87 in her Latin class what score does she need on the final exam to have a mean grade of 80? Run your answer to decimal places if necessary all exams have a maximum of 100 points

Answer 1

79

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The total points for the five exams are:

• 90 + 85 + 71 + 68 + 87 = 401 points

To find out what score Jessica needs on the final exam to average an 80, we need to know how many total points that would equate to.

Since we want a mean of 80 over six tests, we multiply 80 by 6 to find the total points needed:

• 80 * 6 = 480

To find out what Jessica needs on her final exam, we subtract the points she already has from the total points needed:

• 480 - 401 = 79

Therefore, Jessica needs to score 79 on her final exam to achieve a mean grade of 80.