单项选择题

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

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单项选择题

There were 1,650 graduates in the class of 2006 at Juniper State College. How many graduates entered Graduate programs

A．215
B．248
C．416
D．396
E．693

单项选择题

In the figure above, RS=ST and the coordinates of S are (k,4). What is the value of k

A. -4
B. -2
C. 0
D. 2
E. 4