What is the average (arithmetic mean) of \(a, b, c, d, e,\) and \(f\) with \(a < b < c < d < e < f ?\)

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What is the average (arithmetic mean) of \(a, b, c, d, e,\) and \(f\) with \(a < b < c < d < e < f ?\)

(1) The average of \(d, e,\) and \(f\) is \(11.\)
(2) The value of \(a\) is \(5\) and \(b + c + d + e + f = 51.\)

[spoiler]OA=B[/spoiler]

Source: GMAT Prep
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