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# If the average of 2x and 4x is 12, then x =

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Math Expert
Joined: 02 Sep 2009
Posts: 52161
If the average of 2x and 4x is 12, then x =  [#permalink]

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21 May 2017, 11:34
00:00

Difficulty:

5% (low)

Question Stats:

94% (00:21) correct 6% (00:09) wrong based on 68 sessions

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If the average of 2x and 4x is 12, then x =

(A) 1
(B) 2
(C) 3
(D) 4
(E) 24

_________________
Senior Manager
Joined: 13 Oct 2016
Posts: 283
GMAT 1: 600 Q44 V28
Re: If the average of 2x and 4x is 12, then x =  [#permalink]

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21 May 2017, 12:13
(2x + 4x / 2 )= 12

6x/2 = 12

3x = 12

x = 4

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Director
Joined: 04 Dec 2015
Posts: 738
Location: India
Concentration: Technology, Strategy
Schools: ISB '19, IIMA , IIMB, XLRI
WE: Information Technology (Consulting)
Re: If the average of 2x and 4x is 12, then x =  [#permalink]

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21 May 2017, 17:18
Bunuel wrote:
If the average of 2x and 4x is 12, then x =

(A) 1
(B) 2
(C) 3
(D) 4
(E) 24

$$\frac{2x + 4x}{2}$$ = 12
6x = 24
x = 4

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Location: India
GPA: 3.5
Re: If the average of 2x and 4x is 12, then x =  [#permalink]

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22 May 2017, 08:35
1
Bunuel wrote:
If the average of 2x and 4x is 12, then x =

(A) 1
(B) 2
(C) 3
(D) 4
(E) 24

$$\frac{2x + 4x}{2} = 12$$

Or, $$3x = 12$$

Or, $$x = 4$$

Hence, answer will be (D) 4
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Intern
Joined: 05 Sep 2016
Posts: 20
Location: Israel
Concentration: Economics, Technology
WE: Engineering (Telecommunications)
Re: If the average of 2x and 4x is 12, then x =  [#permalink]

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22 May 2017, 08:39
Bunuel wrote:
If the average of 2x and 4x is 12, then x =

(A) 1
(B) 2
(C) 3
(D) 4
(E) 24

Avarage = (2x+4x)/2=3x=12
3x=12
Hence, x=4.
Target Test Prep Representative
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Posts: 4518
Location: United States (CA)
Re: If the average of 2x and 4x is 12, then x =  [#permalink]

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30 Apr 2018, 15:39
Bunuel wrote:
If the average of 2x and 4x is 12, then x =

(A) 1
(B) 2
(C) 3
(D) 4
(E) 24

We can create the equation:

(2x + 4x)/2 = 12

6x/2 = 12

6x = 24

x = 4

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Intern
Joined: 04 Apr 2018
Posts: 5
Re: If the average of 2x and 4x is 12, then x =  [#permalink]

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15 May 2018, 18:02
this question could really come to gmat? what is the source of this question
Re: If the average of 2x and 4x is 12, then x = &nbs [#permalink] 15 May 2018, 18:02
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