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  3. Compare Quantity A and Quantity B, using additional information centered above t

Compare Quantity A and Quantity B, using additional information centered above t

游客2025-02-23  23
问题 Compare Quantity A and Quantity B, using additional information centered above the two quantities if such information is given, and select one of the following four answer choices:
(A)Quantity A is greater.
(B)Quantity B is greater.
(C)The two quantities are equal.
(D)The relationship cannot be determined from the information given.
A symbol that appears more than once in a question has the same meaning throughout the question. [br]
选项
答案 B
解析 There are 4 numbers in S and 5 numbers in T, so the total number of possible products that can be formed using one number in each set is(4)(5), or 20. However, some of these products have the same value; for example,(1)(8)=(4)(2). Therefore, Quantity A, the number of different possible values of the product xy, is less than Quantity B, 20. Thus the correct answer is Choice B.
This explanation uses the following strategy.
Strategy 8: Search for a Mathematical Relationship
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