If the average (arithmetic mean) of x and y is 60 and the average...

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If the average (arithmetic mean) of x and y is 60 and the average (arithmetic mean) of y and z is 80, what is the value of z - x?

A. 70

B. 40

C. 20

D. 10

Answer & Explanation

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If the average (arithmetic mean) of x and y is 60 and the average...

If the average (arithmetic mean) of x and y is 60 and the average (arithmetic mean) of y and z is 80, what is the value of z - x?

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