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16 March, 03:17

Suppose you have a data set that includes the values 2030 and 50 if you add a fourth value to this data set in after doing that the mean of the data set is 50 what was the value that you added?

A. - 10

B. 40

C. 50

D. 100

+1
Answers (1)
  1. 16 March, 04:41
    0
    D

    Step-by-step explanation:

    Without doing any math, you can deduce that in a data set with the values 20, 30, and 50, the only possible number you could add that could bring the mean (average) to 50 would be D or 100. But this method will not always work so instead I'll show how to do it mathematically:

    (20 + 30 + 50 + x) / 4 = 50

    20 + 30 + 50 + x = 200

    100 + x = 200

    x = 100
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