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# If the average (arithmetic mean) of a and b is 6, and a^2

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If the average (arithmetic mean) of a and b is 6, and a^2 [#permalink]  07 Jun 2017, 02:19
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If the average (arithmetic mean) of a and b is 6, and a^2 – b^2 = 2, what is the value of a – b ?

A) \frac{1}{6}

B) \frac{1}{3}

C) \frac{1}{2}

D) 2

E) 3
[Reveal] Spoiler: OA

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If the average (arithmetic mean) of a and b is 6, and a^2   [#permalink] 07 Jun 2017, 02:19
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