单项选择题

If x is 1, 2, or 3 and y is either 2 or 4, then the product xy can have how many different possible values（）

A.Three
B. Four
C. Five
D. Six
E. Seven

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单项选择题

The probability that events E and F will both occur is 0.42（）

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.

单项选择题

Carol's age, in years, can be expressed by reversing the digits in her father's age, in years. The sum of the digits in each age is 10.（）

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.