Re: [問題] pp1-ps-62&175
※ 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
--
GMAT、各金融證照 資訊交流 - 勇闖夢想的新鮮人
http://ndxica.pixnet.net/blog
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 111.248.218.175
※ 編輯: dounts 來自: 111.248.218.175 (04/17 15:15)
推
04/17 17:02, , 1F
04/17 17:02, 1F
討論串 (同標題文章)