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18 October, 17:50

What is the missing value in the data set that would make the mean equal 80? Show your work or explain how you got your answer.

{71, 91, 82, 90, 88, 61, 70, __ }

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Answers (2)
  1. 18 October, 17:55
    0
    The correct answer would be 87 exactly.
  2. 18 October, 18:06
    0
    all the numbers have to equal 640

    because mean is add the all up and devide by how many. Theres 8 numbers and times that by 80 to get 640

    so add them all up

    71

    91

    82

    90

    88

    61

    70

    553

    subtract 640 by 553

    youre answer is 87
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