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If n + p + q = 5s, then which of the following represent the average

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If n + p + q = 5s, then which of the following represent the average [#permalink]

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New post 24 Dec 2017, 01:19
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If n + p + q = 5s, then which of the following represent the average (arithmetic mean) of n, p, q, and 2s in terms of s?

A. 7s/4
B. 2s
C. 7s/5
D. 2s + 1
E. 2s -1
[Reveal] Spoiler: OA

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Re: If n + p + q = 5s, then which of the following represent the average [#permalink]

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New post 24 Dec 2017, 07:23
Given that n + p + Q = 5S

Arithmetic mean +> n + P + Q + 2s/4 = 5S + 2S/4 = 7s/4.

Hence answer is A.
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Re: If n + p + q = 5s, then which of the following represent the average [#permalink]

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New post 24 Dec 2017, 13:46
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Bunuel wrote:
If n + p + q = 5s, then which of the following represent the average (arithmetic mean) of n, p, q, and 2s in terms of s?

A. 7s/4
B. 2s
C. 7s/5
D. 2s + 1
E. 2s -1


\(Average = \frac{Sum}{Number.Elements}\)

\(Average = \frac{(n+p+ q)+2s}{4}\); substitute \((n+p+q) = 5s\) -> \(Average = \frac{(5s)+2s}{4}=\frac{7s}{4}\)

(A) is the answer
Re: If n + p + q = 5s, then which of the following represent the average   [#permalink] 24 Dec 2017, 13:46
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