单项选择题

If (7,3) is the center of the circle above, then the radius of the circle could be equal to which of the following（）

A. 2
B. 3
C. 5
D. 7
E. 9

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单项选择题

A political poll showed that 80 percent of those polled said they would vote for proposition P. Of those who said they would vote for proposition P, 70 percent actually voted for P, and of those who did not say they would vote for P, 20 percent actually voted for P. What percent of those polled voted for P

A. 56%
B. 60%
C. 64%
D. 76%
E. 90%

单项选择题

The 20 people at party are divided into n mutually exclusive groups in such a way that the number of people in any group does not exceed the number in any other group by more than 1.（）

A. if Quantity A is greater;
B. if Quantity B is greater;
C. if the two quantities are equal;
D. if you cannot determine the relationship based on the given information.