[計量] 請問4題計量問題^^

看板GRE (GRE入學考試)作者minusthree (minus3)時間17年前 (2008/09/26 11:53)推噓0(0推 0噓 0→)

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1 which of the following equals he reciprocal of x- 1/y, where x-1/y ≠ 0? a) 1/x – y b) –(y/x) c) y/(x-1) d) x/(xy-1) e) y/(xy-1) 2.tickets for all but 100 seats in a 10000- seat stadium were sold. Of the tickets sold, 20 percent were sold at half price and the remaining tickets were sold at the full price of 2$. what was the total revenue from ticket sales? (我有點看不懂題目的意思@@ 希望有人可以解說一下感溫) A)$ 15840 B)$ 17820 C)$ 18000 D)$ 19800 E)$ 21780 3.A bank customers borrowed $10000, but received y dollars less than this due to discounting. If there was a separate $25 service charge charge, then, in terms of y, the service charge was wha fraction of the amount that the customer received? A) 25/ 10000-y B) 25/10000-25y C) 25y/1000-y D) y-25 /10000-y E) 25/10000-(Y-25) 4. In country X a returning tourist may import goods with a total value of $500 or less tax free, but must pay an 8 percent tax on the portion of the total value in excess of $500. What tax must be paid by a returning tourist who imports goods with value of $ 730? (不清楚是只算超過500的部份,也就是230,還是整個730下去算答案會分別是 D or A) A)$ 58.4 B) $40 C) $24.6 D) $18.4 E) $16 感謝~~~頭腦不好希望有好心的網友解惑一下 (解除疑惑是 DISABUSE~XD 我中GRE毒了:p) -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 118.166.46.90 ※ 編輯: minusthree 來自: 118.166.46.90 (09/26 11:53)