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# What is the average (arithmetic mean) of j and k ?

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What is the average (arithmetic mean) of j and k ? [#permalink]

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06 Dec 2012, 06:23
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What is the average (arithmetic mean) of j and k ?

(1) The average (arithmetic mean) of j + 2 and k + 4 is 11.
(2) The average (arithmetic mean) of j, k, and 14 is 10.
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Re: What is the average (arithmetic mean) of j and k ? [#permalink]

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06 Dec 2012, 06:26
Expert's post
What is the average (arithmetic mean) of j and k ?

We need to find the value of $$\frac{j+k}{2}$$.

(1) The average (arithmetic mean) of j + 2 and k + 4 is 11 --> $$\frac{(j+2)+(k+4)}{2}=11$$ --> $$j+k=16$$. Sufficient.
(2) The average (arithmetic mean) of j, k, and 14 is 10 --> $$\frac{j+k+14}{3}=10$$ --> $$j+k=16$$. Sufficient.

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Re: What is the average (arithmetic mean) of j and k ? [#permalink]

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04 Oct 2015, 13:29
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Re: What is the average (arithmetic mean) of j and k ?   [#permalink] 04 Oct 2015, 13:29
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