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If 5w = x+ y, then what is the average (arithmetic mean) of w, x, and

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If 5w = x+ y, then what is the average (arithmetic mean) of w, x, and [#permalink]

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New post 19 Apr 2017, 00:29
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

81% (00:37) correct 19% (01:38) wrong based on 59 sessions

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Joined: 19 Dec 2016
Posts: 48
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GMAT 1: 630 Q49 V27
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Re: If 5w = x+ y, then what is the average (arithmetic mean) of w, x, and [#permalink]

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New post 19 Apr 2017, 00:31
5w=x+y
6w=w+x+y
(w+x+y)/3 = 2w

Arithmetic mean =2w

A
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Re: If 5w = x+ y, then what is the average (arithmetic mean) of w, x, and [#permalink]

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New post Updated on: 19 Apr 2017, 00:35
Average = (x+y+w)/3=(5w+w)/3=6w/3=2w
The answer is A.

Sent from my Redmi 4 using GMAT Club Forum mobile app

Originally posted by kolodits on 19 Apr 2017, 00:34.
Last edited by kolodits on 19 Apr 2017, 00:35, edited 1 time in total.
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Re: If 5w = x+ y, then what is the average (arithmetic mean) of w, x, and [#permalink]

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New post 19 Apr 2017, 02:55
To find: w+x+y/3............... eq.1
Given: 5w= x+y...................eq.2

Putting the value from eq. 2 in eq. 1
Average= w+5w/3= 6w/3= 2w
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Re: If 5w = x+ y, then what is the average (arithmetic mean) of w, x, and [#permalink]

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New post 23 Apr 2017, 18:49
valardohaeris wrote:
5w=x+y
6w=w+x+y
(w+x+y)/3 = 2w

Arithmetic mean =2w

A


Why do we add w? I tried plugging in a number like 3 for w and 10 and 5 for x and then tried adding all three and dividing by 3.
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Re: If 5w = x+ y, then what is the average (arithmetic mean) of w, x, and [#permalink]

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New post 24 Apr 2017, 17:15
1
Bunuel wrote:
If 5w = x+ y, then what is the average (arithmetic mean) of w, x, and y in terms of w?

A. 2w
B. 3w
C. w + 2
D. 1/3*w
E. 1/2*w


We need to determine the average of w, x, and y, or the value of (w + x + y)/3. Since 5w = x + y, we can say:

(w + 5w)/3 = 6w/3 = 2w

Answer: A
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Re: If 5w = x+ y, then what is the average (arithmetic mean) of w, x, and   [#permalink] 24 Apr 2017, 17:15
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If 5w = x+ y, then what is the average (arithmetic mean) of w, x, and

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