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Gina and Tina's average grade is 23 points higher than Tina's grade.

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Math Expert
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Joined: 02 Sep 2009
Posts: 59561
Gina and Tina's average grade is 23 points higher than Tina's grade.  [#permalink]

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New post 12 Jul 2016, 04:37
1
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A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

88% (01:05) correct 13% (01:36) wrong based on 61 sessions

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Gina and Tina's average grade is 23 points higher than Tina's grade. What is the difference between their grades?

A. 46.
B. 23.
C. 16.
D. 15.
E. 11.5.
Retired Moderator
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Joined: 26 Nov 2012
Posts: 554
Re: Gina and Tina's average grade is 23 points higher than Tina's grade.  [#permalink]

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New post 12 Jul 2016, 05:27
Bunuel wrote:
Gina and Tina's average grade is 23 points higher than Tina's grade. What is the difference between their grades?

A. 46.
B. 23.
C. 16.
D. 15.
E. 11.5.



Given: Gina and Tina's average grade is 23 points higher than Tina's grade

Then we can write it ( G + T ) / 2 = 23 + T.

=> ( G + T ) = 46 + 2T.

G - T = 46.

IMO A is correct option.

OA please....will correct if I missed anything.
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Re: Gina and Tina's average grade is 23 points higher than Tina's grade.  [#permalink]

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New post 10 Dec 2016, 10:36
Target Test Prep Representative
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Status: Head GMAT Instructor
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Joined: 04 Mar 2011
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Re: Gina and Tina's average grade is 23 points higher than Tina's grade.  [#permalink]

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New post 26 Feb 2018, 11:00
Bunuel wrote:
Gina and Tina's average grade is 23 points higher than Tina's grade. What is the difference between their grades?

A. 46.
B. 23.
C. 16.
D. 15.
E. 11.5.


We can let Gina and Tina’s average grade = (g + t)/2. Since Gina and Tina's average grade is 23 points higher than Tina's grade:

(g + t)/2 = 23 + t

g + t = 46 + 2t

g = 46 + t

g - t = 46

Answer: A
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Re: Gina and Tina's average grade is 23 points higher than Tina's grade.   [#permalink] 26 Feb 2018, 11:00
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