多项选择题

Every year between 70% and 85% of the students at Central High School attend the homecoming rally. If one year 1435 students attended the rally, which of the following could have been the number of students at Central High School that year Indicate all possible numbers of students.（）

A. 1675
B. 1775
C. 1875
D. 1975
E. 2075

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单项选择题

An investor wants to sell some of the stock that he owns in Micro Tron and Dynaco Corporations. He can sell Micro Tron stock for $ 36 per share, and he can sell Dynaco stock for $ 52 per share. If he sells 300 shares altogether at an average price per share of $40, how many shares of Dynaco stock has he sold（）

A. 52
B. 75
C. 92
D. 136
E. 184

单项选择题

Because her test turned out to be more difficult than she intended it to be, a teacher decided to adjust the grades by deducting only half the number of points a student missed. For example, if a student missed 10 points, she received a 95 instead of a 90. Before the grades were adjusted the class average was A. What was the average after the adjustment（） (E) A+25

A.A
B.B
C.C
D.D
E.E

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