Re: [問題] pp1-ps-62&175

看板GMAT (GMAT入學考試)作者Merica (美加文教)時間15年前 (2011/04/25 14:23)推噓0(0推 0噓 0→)

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句意是：年底所存的錢總金額是她每個月薪水沒有存的部份金額的3倍。假設每月薪水存起來的部份 = X 年底所存的錢總金額 = 12X 每個月薪水沒有存的部份 = 1 -X 12X = 3(1-X) 15X=3 X=1/5 （以上內容由美加黃冠文老師提供） ※ 引述《dounts (忘記過去)》之銘言： : ※ 引述《wonderfulhwh (leeward)》之銘言： : : 62. : : Alice's take-home pay last year was the same each month, and she saved the : : same fraction of her take-home pay each m : : onth. 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? : : 請問答案為什麼是(D) 1/5 ? : 題目有點不好懂但還是看懂了 : The total amount of money that she had saved at the end of the year : 是指他整年所存的錢 : monthly take-home pay that she did not save : 是指一個月當中他所沒存錢的部分 : 這題難就難在大家沒看出這是"整年"和"一個月"比較 : 所以存了 x, 沒存 1-x (fraction) : 12x = 3(1-x) : x = 1/5 : : 175. : : Before being simplified, the instructions for computing income tax in Country : : R were to add 2 percent of one's annual income to the average (arithmetic : : mean) of 100 units of Country R's currency and 1 percent of one's annual : : income. Which of the following represents the simplified formula for : : computing the income tax, in Country R's currency, for a person in that : : country whose annual income is I ? : : 答案:(C) 50+I/40 看不太懂題意..... : : 這兩題麻煩好心人士幫忙謝謝~ : add 2 percent of annual income to the average of xxxx : = 2 percent of annual income + average of xxxx : xxxx = (100 , 1% I) : 所以 total income tax = 2%I + average (100, 1%I) : = 2%I + (100 + 1%I)/2 : = 50 + I/40 -- ▅▅▅▅ ▅▅ ▅▅▅ ▅ ▅▅ ▅▅▅ █ █ █ █▅ █▄█ ▄ █ █▄█ █ █ █ █▄ █◥▅ █ █▅ █ █ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 111.248.105.220