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If \(x, y,\) and \(z\) are positive numbers, what is the value of the average (arithmetic mean) of \(x\) and \(z ?\)
(1) \(x - y = y - z\)
(2) \(x^2 - y^2 = z\)
Answer: E
Source: Official Guide
(1) \(x - y = y - z\)
(2) \(x^2 - y^2 = z\)
Answer: E
Source: Official Guide
