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2015年8月21日GRE數(shù)學(xué)機(jī)經(jīng)
1.有 3 個(gè)打字員為 4 家公司服務(wù)，如果 4 家公司各有 1 份文件要錄入，他們只能找到這 3 個(gè)打字員錄入， 且各公司對(duì)打字員的要求是隨機(jī)的。問(wèn)每個(gè)打字員都收到文件的概率是多少?
2.The price of an item is discounted by 20 percent and then this reduced price is discounted by an additional 30 percent. These two discounts are equal to an overall discount of what percent?
3.Out of 100 ladies attending the church fete, 85 had a white handbag; 75 had black shoes;
60 carried an umbrella; 90 wore a ring, How many ladies must have had all four items?
(A)15 (B)35 (C)5 (D)10 (E)25
4.The daily rate for a hotel room that sleeps 4 people is $39 for one person and x dollars for each additional person. If 3 people take the room for one day and each pays $21 for the room, what is the value of x?
(A) 6 (B) 8 (C) 12 (D) 13 (E) 24
5.A store currently charges the same price for each towel that it sells. If the current price
of each towel was to be increased by $1, 10 fewer of the towels could be bought for $120, excluding sales tax. What is the current price of each towel?
(A)$ 1 (B)$ 2 (C)$3 (D)$ 4 (E)$ 12
6.有 4 對(duì)男女，每對(duì)中有 1 男 1 女，從每對(duì)中選出 1 人，選出 2 男 2 女的概率是多少?
7.假如世界杯比賽共有 32 支球隊(duì)，分成 8 個(gè)組，每組 4 個(gè)隊(duì)，每組前兩名出線，然后成對(duì)進(jìn)行淘汰賽，直至 決賽決出冠軍，并且淘汰隊(duì)不參加比賽，從中間任選出一場(chǎng)比賽觀看是半決賽的機(jī)會(huì)有多大?
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