GMAT考试

【单选题】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 statementALONE、is sufficient.
D、EACH statementALONE、is sufficient.
Ｅ. Statements (1) and (2) TOGETHER are NOT sufficient.
An employee at a company was given the task of making a large number of copies. He spent the first 45 minutes making copies at a constant rate on copierA, but copierA、broke down before the task was completeD、He then spent the next 30 minutes finishing the task on copierB, which also produced copies at a constant rate. How many total minutes would the task have taken had copierA、not broken down
(1)CopierA、produced twice as many copies in its first 5 minutes of operation as copierB、produced in its first 15 minutes.
(2)CopierB、produces 10 copies per minute.
网考网参考答案：A
网考网解析：
alone is sufficient because it gives the relative rates of the two machines; if copier A can produce twice as many copies as copier B can produce in three times the time, then it could have finished the task in one-sixth the time it took copier B, or 5 minutes. (2) alone is insufficient because it does not allow you to determine the relative speeds of the two machines. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>