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The table above shows the distribution of scores on a geography quiz

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The table above shows the distribution of scores on a geography quiz  [#permalink]

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New post Updated on: 07 Apr 2018, 11:40
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

67% (01:34) correct 33% (01:20) wrong based on 55 sessions

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The table above shows the distribution of scores on a geography quiz given to a class of 25 students. Which of the following is closest to the average (arithmetic mean) quiz score for the class?

A. 8.6
B. 8.5
C. 8.4
D. 8.3
E. 8.0

Attachment:
gmat quiz question.JPG
gmat quiz question.JPG [ 14.5 KiB | Viewed 1070 times ]

Originally posted by hmazariegos on 07 Apr 2018, 11:09.
Last edited by Bunuel on 07 Apr 2018, 11:40, edited 1 time in total.
Edited the question and added the options.
Intern
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Joined: 14 May 2016
Posts: 23
Re: The table above shows the distribution of scores on a geography quiz  [#permalink]

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New post 07 Apr 2018, 11:14
Here is how i solved it:

(6*2) + (7*4) + (8*7) + (9*9) + (10*3) / (2 + 4 + 7 + 9 + 3)

207 / 25 = 8.28 ~ 8.3 hence answer is "D"
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Re: The table above shows the distribution of scores on a geography quiz &nbs [#permalink] 07 Apr 2018, 11:14
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The table above shows the distribution of scores on a geography quiz

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