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# The average (arithmetic mean) of x, y and 6 is 3

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The average (arithmetic mean) of x, y and 6 is 3 [#permalink]  09 Dec 2016, 08:24
Expert's post
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Question Stats:

72% (00:24) correct 27% (00:41) wrong based on 40 sessions
The average (arithmetic mean) of x, y and 6 is 3

 Quantity A Quantity B $$\frac{(x+y)}{2}$$ $$\frac{3}{2}$$

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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Re: The average (arithmetic mean) of x, y and 6 is 3 [#permalink]  29 Dec 2016, 15:18
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Expert's post
Carcass wrote:
The average (arithmetic mean) of x, y and 6 is 3

 Quantity A Quantity B (x+y)/2 3/2

The average (arithmetic mean) of x, y and 6 is 3
We can write: (x + y + 6)/3 = 3
Multiply both sides by 3 to get: x + y + 6 = 9
Subtract 6 from both sides to get: x + y = 3

Given:
Quantity A: (x+y)/2
Quantity B: 3/2

Replace x+y with 3 to get:
Quantity A: 3/2
Quantity B: 3/2

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Re: The average (arithmetic mean) of x, y and 6 is 3   [#permalink] 29 Dec 2016, 15:18
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