MathStatisticsDescriptive statistics

Mean, median, and mode

Theory

What's the x?

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There is the set X={25,21,0,1,x,5,79}X = \{ 25, 21, 0, 1, \text{x}, 5, 79 \}

Write down the value of the x, if it is known, that X’sX\text{'s} mean = 20, median = 9.

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