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The number line shown contains three points R, S, and T, whose coordin

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Re: The number line shown contains three points R, S, and T, whose coordin [#permalink]

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New post 26 Jul 2017, 16:42
jamifahad wrote:
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The number line shown contains three points R, S, and T, whose coordinates have absolute values r, s, and t, respectively. Which of the following equals the average (arithmetic mean) of the coordinates of the points R, S, and T ?

A. s
B. s + t - r
C. (r - s - t)/3
D. (r + s + t)/3
E. (s + t - r)/3


We can let R, S, and T be the actual values. Thus, we want to determine the value of (R + S + T)/3. Since S and T are positive, S = s and T = t. However, since R is negative, R = -r. Thus, the average becomes:

(-r + s + t)/3

(s + t - r)/3

Answer: E
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Re: The number line shown contains three points R, S, and T, whose coordin [#permalink]

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New post 01 Aug 2017, 05:27
Here in this question if the question would ask the average of r,s,t then the average would be r+s+t/3 because r is the absolute value?? Am i correct

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Re: The number line shown contains three points R, S, and T, whose coordin   [#permalink] 01 Aug 2017, 05:27

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