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

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Math Expert
Joined: 02 Sep 2009
Posts: 53020
If n + p + q = 5s, then which of the following represent the average  [#permalink]

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24 Dec 2017, 00:19
00:00

Difficulty:

15% (low)

Question Stats:

90% (00:58) correct 10% (01:38) wrong based on 42 sessions

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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

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Intern
Joined: 02 Apr 2017
Posts: 11
Re: If n + p + q = 5s, then which of the following represent the average  [#permalink]

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24 Dec 2017, 06:23
Given that n + p + Q = 5S

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

Manager
Joined: 24 Nov 2016
Posts: 151
Re: If n + p + q = 5s, then which of the following represent the average  [#permalink]

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24 Dec 2017, 12:46
1
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 $$(n+p+q) = 5s$$ -> $$Average = \frac{(5s)+2s}{4}=\frac{7s}{4}$$

Re: If n + p + q = 5s, then which of the following represent the average   [#permalink] 24 Dec 2017, 12:46
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