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If the average of three numbers is 3x and two of the number

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If the average of three numbers is 3x and two of the number [#permalink] New post 23 Jan 2018, 15:14
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Question Stats:

20% (02:09) correct 80% (01:49) wrong based on 5 sessions


If the average of three numbers is 3 and two of the numbers are 2x – y and x + y, what is the third number in terms of x and y?

A. x+y

B. x-y

C. 6x-2y

D. 9x

E. 6x

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[Reveal] Spoiler: OA

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Re: If the average of three numbers is 3x and two of the number [#permalink] New post 24 Jan 2018, 03:08
(2x-y+x+y+C)/3=3
(3x+C)/3=3
On Substituting C=6x
9x/3==>3

Therefore 6x
Re: If the average of three numbers is 3x and two of the number   [#permalink] 24 Jan 2018, 03:08
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If the average of three numbers is 3x and two of the number

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