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31 Jan 2018, 07:28
Kudos
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
83% (01:40) correct
17%
(01:49)
wrong
based on 206
sessions
History
Date
Time
Result
Not Attempted Yet
The graph above shows the distribution of test scores for a certain class. What was the average (arithmetic mean) score?
(A) 87
(B) 81
(C) 80
(D) 78
(E) 75
Attachment:
2018-01-31_1826.png [ 25.7 KiB | Viewed 8751 times ]
31 Jan 2018, 07:39
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A
Total score = 5*70 + 20*80 + 10*90 + 15*100
= 4350
Total number of students = 5+20+10+15 =50
Average = 4350/50 = 87
Sent from my iPhone using GMAT Club Forum
Total score = 5*70 + 20*80 + 10*90 + 15*100
= 4350
Total number of students = 5+20+10+15 =50
Average = 4350/50 = 87
Sent from my iPhone using GMAT Club Forum
10 Mar 2018, 20:28
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Bunuel
I was able to answer the question by the conventional way as explained by Sasindran above and I also understand that since it is sub 600 level it got to have this type of calculation. I am just wondering if there are some other ways too to solve the question.
