GRE Question of the Day (June 17)

Math

If \({1+x+x^2+x^3=60}\), then the average (arithmetic mean) of \({x}\), \({x^2}\), \({x^3}\), and \({x^4}\) is equal to which of the following?

A. 12x
B. 15x
C. 20x
D. 30x
E. 60x

Correct Answer - B - (click and drag your mouse to see the answer)

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