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30 October, 04:54

A student took 5 tests this marking period and had a mean score of 90. Her scores on the first 4 tests were 90, 96, 86, and 92. What was her score on the fifth test?

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Answers (2)
  1. 30 October, 05:08
    0
    (90+96+86+92+s) / 5=90

    (364+s) / 5=90

    364+s=450

    s=86

    So she scored an 86 on the fifth test.
  2. 30 October, 05:13
    0
    First you have to find out the pattern which is + 6 and - 10, 90+6=96, 96-10, 86 and 86+6=92, so the score of the fifth test will be 82, because the pattern will be - 10 after + 6
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