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The average of the three numbers $\mathrm{x}, \mathrm{y}$, and $\mathrm{z}$ is $\mathrm{X} \cdot \mathrm{y}$.
in Mathematics by Diamond (75,914 points) | 10 views

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An average (arithmetic mean) is the sum of the terms divided by the number of terms. Thus, the average of $x, y$, and $z$ equals $\frac{x+y+z}{3}$. Substitute the information in the question into the equation: $\frac{x+y+z}{3}=x \cdot y .$ Multiply both sides by $3: x+y+z=3 \cdot x \cdot y \cdot$ Solve for $z: z=3 \cdot x \cdot y-x-y$
by Diamond (75,914 points)

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