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.

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单项选择题

A certain doctor suggests that an individual’s daily water intake be ounce per pound of body weight plus 8 ounces for every 25 pounds by which the individual exceeds his or her ideal weight. If this doctor suggests a daily water intake of 136 ounces for a particular 240-pound individual, how many pounds above his or her ideal weight is that individual（）

A.
B. 16
C. 30
D. 50
E. 120

单项选择题

At a sale, the cost of each tie was reduced by 20 percent and the cost of each belt was reduced by 30 percent.（）

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.