GRE考试

【单选题】When 9 students took a zoology quiz with a possible score of 0 to 10 inclusive, their average (arithmetic mean) score was 7.5. If a tenth student takes the same quiz, what will be the least possible average score on the quiz for all 10 students
A、6.5
B、6.75
C、7.0
D、7.25
E、7.5

网考网参考答案：B
网考网解析：
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