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1: 第一题是prep里ps1里的数学第五题，是求M 的，贴不上来，但是这题我怎么都算不出来。
2：Alice
's take-home pay last year was the same each month, and she saved the same fraction of her take-home pay each month.The total amount of money that she had saved at the end of the year was 3 times the amount of that portion of her monthly take-home pay that she did not save.If all the money that she saved last year was from her take-home pay, what fraction of her take-home pay did she save each month?
(A) 1/2
(B) 1/3
(C) 1/4
(D) 1/5
(E) 1/6
3At a dinner party, 5 people are to be seated around a circular table.Two seating arrangements are considered different only when the positions of the people are different relative to each other.What is the total number of different possible seating arrangements for the group?
(A) 5
(B) 10
(C) 24
(D) 32
(E) 120
第二题：题目看不明白，希望大家能够简要翻译一下。第三题：我碰到两次，但是现在还是不明白这题。
At a dinner party, 5 people are to be seated around a circular table.Two seating arrangements are considered different only when the positions of the people are different relative to each other.What is the total number of different possible seating arrangements for the group?
(A) 5
(B) 10
(C) 24
(D) 32
(E) 120
第二题：题目看不明白，希望大家能够简要翻译一下。第三题：我碰到两次，但是现在还是不明白这题。
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发表于 2010-8-26 16:17:58
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