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What if your quiz grades are 19 17 20 and 15 What grades can you receive on the next quiz and maintain at least an 18 average?

Jodi Brooks

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Ralph Lopez on November 15, 2018

If you take a test more, the total number of quizzes taken will be 5. In order to have at least an 18 average of more than 5 quizzes, the sum total of all grades must be 5 x 18 = 90. The total of the sum of the previous 4 questionnaires was 19 + 17 + 20 + 15 = 71. Therefore, you need at least a grade of 90 - 71 = 19. The answer to the question is therefore "19 or more".


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