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Re: Gina and Tina's average grade is 23 points higher than Tina's grade. [#permalink]
Expert Reply
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
GMAT Club Bot
Re: Gina and Tina's average grade is 23 points higher than Tina's grade. [#permalink]
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