The incomplete table above shows a distribution of scores for a class of 20 students. If the average (arithmetic mean)

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C

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Class_Incomplete.JPG
The incomplete table above shows a distribution of scores for a class of 20 students. If the average
(arithmetic mean) score for the class is 78, what score is missing from the table?

A. 73
B. 75
C. 77
D. 79
E. 81

Answer: C

Source: GMAT Paper Tests
Source: — Problem Solving |