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1 If m is a positive odd integer, what is the average (arithmetic mean) of a certain set of m integers? (1) The integers in the set are consecutive multiples of 3. (2) The median of the set of integers is 33.
(2) The median of the set of integers is 33.
答案是C. 请教大家~ 觉得根据第二条不是就可以得出：median= arithmetic mean了嘛。。为啥不选择b呢？
2 A certain restaurant offers 6 kinds of cheese and 2 kinds of fruit for its dessert platter. If each dessert platter contains an equal number of kinds of cheese and kinds of fruit, how many different dessert platters could the restaurant offer? A. 8 B. 12 C. 15 D. 21 E. 27 答案是E.solution is C(1,6)*C(1,2)+C(2,6)=27 弱问一下：这个式子啥意思？怎么计算得出的？ 3. What is the remainder when the positive integer n is devided by the postive integer k, where k>1? (1) n=(k+1)^3 (2)k=5 答案是A. 错选C。。根据A如何得出上面的结论呢？ 谢谢~~ |
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发表于 2008-9-19 01:32:00
