A student got these marks on 7math tests:
What mark will the student need on the 8th test to make each statement true?
a)The mean of the tests is 84%
b)The mode of the eight tests is 86%
c)The median of the eight tests is 84%

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  1. This should help you:

    Mean = Σscores/number of scores = (All the scores +8th)/8

    Mode is the most frequently occurring score.

    Median is 50th percentile, so you need as many score below 84% as above.

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  2. A student has a mean score of 88 on five tests taken. What score must she obtain on her next test to have a mean (average) score of 80 on all six tests?

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