单项选择题

After a store had sold k television sets for p dollars each，it reduced the price p of each set by 5 percent and then sold twice as many sets at this reduced price．（）

A、if the quantity in Column A is greater;
B、if the quantity in Column B is greater;
C、if the two quantities are equal;
D、 if the relationship cannot be determined from the information given.

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单项选择题
Three salespeople are paid commissions in proportion to the amount of their sales，which total $25，000， $40，000， and$60，000， respectively． If a total of$20，000 is allocated for these three commission，what is the amount of the largest commission paid？（）

A. $8，000
B. $8，400
C. $9，600
D. $10，000
E. $12，000
单项选择题
In a history Class that consisted of 30students，the number of seniors was 3more than twice the number of juniors，and of the students were neither juniors nor seniors． （）

A、if the quantity in Column A is greater;
B、if the quantity in Column B is greater;
C、if the two quantities are equal;
D、 if the relationship cannot be determined from the information given.
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