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

游客2024-01-12  19

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 A

解析 Note that Quantity B, $80, is the average of the 4 donations. The average of 2 of the 4 donations, $90 and $60, is $75. Since $75 is less than $80, it follows that Quantity A, the average of the other 2 donations, is greater than Quantity B. Therefore the correct answer is Choice A.
This explanation uses the following strategy.
Strategy 8: Search for a Mathematical Relationship
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