Re: [計量] 問幾題數學^^
※ 引述《minusthree (minus3)》之銘言：
: 1. a ,b are non-negative integrate
: column A : (a + b)^◇ column B: a + b^◇
: ans : c
c好怪...
: 2. x= 4y and x≠0 ,
: column A : the percent of x+y that x present column B: 75%
: ans:b
x/x+y= 4/5
: 3. The volume of a cube is 64 ,
: column A : the area of the base of the cube column B: 32
: ans:b
4^2=16
: 4. the price of a certain hardback book is 3 times the price of
: the paperback edition of the same book. At a sale, the number if
: hardback books sold was 5 times the number of paperback editions
: sold. If a total of $ 600 was collected from the sale of this book,
: how much was collected from the sale of the paperback edition?
: a) $ 37.5 b) $ 40.00 c) $66.67 d) $75.00 e) $ 360.0
: ans: e
: 我一直算出來 A 不知道是不是我題目意思理解錯了
: 希望有高手可以也解釋一下題目的意思^^a
數字有打錯嗎 ? 看小數點感覺不太對
: 5. a couple sold their home 5 months before the annual coverage on
: their homeowner’s policy expired. If the company’s policy is to
: return 1/12 of the yearly premium for each month the policy is not
: used and their premium was $168 a year, how much of their payment would
: the insurance company return to them?
: a) $65 b) $70 c) $75 d) $93 e) $ 98
: ans: c
: 我算出來是bㄟ.....T_T
是b吧
: 6. a grocer has 400 pounds of coffee in stock, 20 percent of which
: is decaffeinated. If the grocer buys another 100 pounds of coffee
: of which 60 percent is decaffeinated,what percent ,
: by weight , of the grocer’s stock of coffee is decaffeinated?
: a) 28% b) 30% c) 32% d)34% e) 40%
: ans: d
(400*0.2+100*0.6)/500=28%
: 7. 一個@,2個 $, 2個 #, 組成一個5位元的密碼
: column a: 總排列數 columnb: 30
: ans: c
5!/2!2!
: ==================================================
: 我問了好多.....|||||先謝謝各位高手幫忙 麻煩大家了
: 倒數幾天就要考試了......還是一點自信都沒有T_T
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◆ From: 61.224.56.23
※ 編輯: berrylover 來自: 61.224.56.23 (10/21 23:24)
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