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# GRE Math Challenge #90-The average (arithmetic mean) of 7, 9

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GRE Math Challenge #90-The average (arithmetic mean) of 7, 9 [#permalink]  09 May 2015, 11:08
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Question Stats:

90% (00:26) correct 9% (01:21) wrong based on 11 sessions
The average (arithmetic mean) of 7, 9, and x is greater than 9.

Quantity A: x
Quantity B: 11
• Quantity A is greater.
• Quantity B is greater.
• Both Quantities are Equal
• Cannot be determined
[Reveal] Spoiler: OA

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Manager
Joined: 03 Dec 2017
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Kudos [?]: 16 [0], given: 20

Re: GRE Math Challenge #90-The average (arithmetic mean) of 7, 9 [#permalink]  17 Jan 2018, 00:02
A is greater. I plug 11 in x, the average is 9
Intern
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Re: GRE Math Challenge #90-The average (arithmetic mean) of 7, 9 [#permalink]  26 Jan 2018, 10:32
(7+9+X)/3 > 9
(16+X) > 27
X>11
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Re: GRE Math Challenge #90-The average (arithmetic mean) of 7, 9   [#permalink] 26 Jan 2018, 10:32
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