Posted by **Cherie** on Friday, May 4, 2012 at 11:59am.

A student got these marks on 7math tests:

91%,75%,95%,,80%,83%,86%,68%

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%

- Math -
**PsyDAG**, Sunday, May 6, 2012 at 4:23am
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.

- Math -
**Anonymous**, Sunday, August 19, 2012 at 3:43pm
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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