The following data sufficiency problems consist of a question and two statements

游客2024-01-14  14

问题 The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether
   A.  Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
   B.  Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
   C.  BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
   D.  EACH statement ALONE is sufficient.
   E.  Statements (1) and (2) TOGETHER are NOT sufficient. [br] Over the weekend, a shoe store sold 1/3 of the shoes in its stock. The average price of the shoes sold was $60 per pair. What was the total revenue from shoe sales over the weekend for this shoe store?
   (1) When the store closed on Sunday night, 600 pairs of shoes were still in stock.
   (2) The store began the weekend with 900 pairs of shoes.

选项

答案 D

解析 Since we know the average price per pair of shoes sold, all we need to determine is the number of pairs of shoes sold. Statement (1) provides this answer, because we can determine that if 2/3 of the original stock is 600, then the original stock was 900; 1/3 of 900 is 300 pairs of shoes; 300×$60=$18,000. Statement (2) is also sufficient because 1/3 of 900 is 300; 300×$60=$18,000.
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