单选题When the average of a list of course grades is multiplied by the number of courses, the result is n. What does n represent?AHalf the number of coursesBHalf the sum of course gradesCThe number of coursesDThe average of the course gradesEThe sum of the course grades
单选题
When the average of a list of course grades is multiplied by the number of courses, the result is n. What does n represent?
A
Half the number of courses
B
Half the sum of course grades
C
The number of courses
D
The average of the course grades
E
The sum of the course grades
参考解析
解析：
利用平均值的计算公式，分析题目中的数量关系，即可得出答案。
利用平均值的计算公式，分析题目中的数量关系，即可得出答案。
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