What is the average (arithmetic mean) of j and k ? : GMAT Data Sufficiency (DS)
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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, 05:23
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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, 05:26
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, 12:29
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Re: What is the average (arithmetic mean) of j and k ? [#permalink]

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21 Dec 2016, 16:33
Nice official Question.
Here is my solution to this one =>
In order to get the mean => we need the sum j+k

Statement 1=>
j+k=22-6=16
Hence sufficient

Statement 2=>
j+k=30-14=16
Hence sufficient

Hence D

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Re: What is the average (arithmetic mean) of j and k ?   [#permalink] 21 Dec 2016, 16:33
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