juliaPL在2004-9-21 8:37:00的发言:
Q21: The results of a certain experiment included 6 data values that were all multiples of the same number c, namely, c, 8c, 2c, 5c, 4c, and 4c. Was the average (arithmetic mean) of the 6 data values greater than 8? (1) c < 4 (2) c > 2 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. 这道题的参考答案是B, 可是我觉得是D, 因为只要知道是否能够算出来就行了,请指点
Is it C,or B?
why my 参考答案 is C?? but I cannot get it by myself , I get B
后来才发现我看错自已的答案了
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[此贴子已经被作者于2005-2-26 0:24:10编辑过] |