2. 外语
  3. If seven integers are ordered from least to greatest, what is the median of the resulting sequence? (1)The average mean of the r

If seven integers are ordered from least to greatest, what is the median of the resulting sequence? (1)The average mean of the r

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问题 If seven integers are ordered from least to greatest, what is the median of the resulting sequence?
(1)The average mean of the resulting sequence is 90.
(2)The greatest four integers are 90, 91, 92, 93.
选项 A、Statement (1) ALONE is sufficient, but statement (30) alone is not sufficient to answer the question asked.
B、Statement (2) ALONE is sufficient, but statement (29) alone is not sufficient to answer the question asked.
C、BOTH statement (1) and (30) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient to answer the question asked.
E、Statement (1) and(30)TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.
答案B
解析 对于Statement (1)，由于我们不知道这7个数是否是连续的正整数，因此median和mean是否相等，我们不知道，单独(1)无法确定。对于Statement (2)，一共7个数，那么median必然是排序后的第4个数，现在最大的四个数已经已知，那么第四个数必然为90，所以median为90。因此答案为B。
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