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# The average (arithmetic mean) of 12 and 20 is equal to the a

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The average (arithmetic mean) of 12 and 20 is equal to the a [#permalink]  14 May 2018, 12:13
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84% (00:25) correct 15% (00:13) wrong based on 13 sessions
The average (arithmetic mean) of 12 and 20 is equal to the average (arithmetic mean) of 15 and x.

 Quantity A Quantity B x 16

A)The quantity in Column A is greater.
B)The quantity in Column 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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Joined: 20 Apr 2016
Posts: 817
WE: Engineering (Energy and Utilities)
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Kudos [?]: 588 [1] , given: 113

Re: The average (arithmetic mean) of 12 and 20 is equal to the a [#permalink]  03 Aug 2018, 21:52
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Carcass wrote:
The average (arithmetic mean) of 12 and 20 is equal to the average (arithmetic mean) of 15 and x.

 Quantity A Quantity B x 16

A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.

From the statement we can write as:

$$\frac{12 + 20}2 = \frac{15 + x}2$$

or $$x = 12 + 5 = 17$$

QTY A > QTY B
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Re: The average (arithmetic mean) of 12 and 20 is equal to the a   [#permalink] 03 Aug 2018, 21:52
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# The average (arithmetic mean) of 12 and 20 is equal to the a

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