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# In terms of y, what is the average (arithmetic mean) of 4y

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GMAT Club Legend
Joined: 07 Jun 2014
Posts: 4750
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
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In terms of y, what is the average (arithmetic mean) of 4y [#permalink]  22 Nov 2017, 19:14
Expert's post
00:00

Question Stats:

100% (00:06) correct 0% (00:00) wrong based on 4 sessions
In terms of y, what is the average (arithmetic mean) of 4y and 22 ?

A. 4y + 22
B. 4y + 11
C. 4y − 22
D. 2y + 11
E. 2y + 22

Drill 1
Question: 1
Page: 521
[Reveal] Spoiler: OA

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Sandy
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Director
Joined: 20 Apr 2016
Posts: 761
Followers: 6

Kudos [?]: 517 [0], given: 94

Re: In terms of y, what is the average (arithmetic mean) of 4y [#permalink]  02 Dec 2017, 10:59
sandy wrote:
In terms of y, what is the average (arithmetic mean) of 4y and 22 ?

A. 4y + 22
B. 4y + 11
C. 4y − 22
D. 2y + 11
E. 2y + 22

Drill 1
Question: 1
Page: 521

Here the average of 4y and 22 = $$\frac{1}{2}$$ * (4y + 22) = 2y + 11
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GMAT Club Legend
Joined: 07 Jun 2014
Posts: 4750
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 93

Kudos [?]: 1664 [0], given: 396

Re: In terms of y, what is the average (arithmetic mean) of 4y [#permalink]  09 Dec 2017, 19:39
Expert's post
Explanation

To find the average, add up the values and divide by 2:
$$\frac{4y+22}{2}=\frac{2(2y +11)}{2}=2y +11$$.

You can also Plug In on this one. If y = 3, then $$\frac{4*3+22}{2}$$=17, your target number.

Only choice (D) hits the target.
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Sandy
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Re: In terms of y, what is the average (arithmetic mean) of 4y   [#permalink] 09 Dec 2017, 19:39
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