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Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here. The average (arithmetic mean) of 67, 78, x, and 101  Question banks Downloads My Bookmarks Reviews Important topics
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Founder  Joined: 18 Apr 2015
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Kudos [?]: 1326 , given: 6284

The average (arithmetic mean) of 67, 78, x, and 101 [#permalink]
Expert's post 00:00

Question Stats: 61% (00:58) correct 38% (00:30) wrong based on 31 sessions

 Quantity A Quantity B The average (arithmetic mean) of 67, 78, x, and 101 The average (arithmetic mean) of 66, 79, x, and 102

A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

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Director Joined: 03 Sep 2017
Posts: 520
Followers: 1

Kudos [?]: 356 , given: 66

Re: The average (arithmetic mean) of 67, 78, x, and 101 [#permalink]
The two columns can be written as $$\frac{67+78+x+101}{4}$$ and $$\frac{66+79+x+102}{4}$$. Using matching operations method, and after rearranging, we get column A equal to $$1+x$$ and column B equal to $$2+x$$, thus whatever value of X, column B is greater! Re: The average (arithmetic mean) of 67, 78, x, and 101   [#permalink] 27 Sep 2017, 04:41
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The average (arithmetic mean) of 67, 78, x, and 101  Question banks Downloads My Bookmarks Reviews Important topics Powered by phpBB © phpBB Group Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.