推 catspace:02-22答案是B 不小心打錯 09/27 17:23
推 catspace:吼又打錯 答案是C 你的答案沒錯 =.= 09/27 17:36
※ 引述《catspace (柏拉圖的永恆...)》之銘言：
: ※ 引述《minie (散落在我手中的是溫柔)》之銘言：
: : GWD-01-Q2
: : If 2 different representatives are to be selected at random from a group of
: : 10 employees and if p is the probability that both representatives selected
: : will be women, is p > 1/2 ?
: : (1) More than 1/2 of the 10 employees are women.
: : (2) The probability that both representatives selected will be men is
: : less than 1/2
: : ANS:E
: : GWD-01-Q15
: : If p is the product of the integers from 1 to 30, inclusive, what is the
: : greatest integer k for which 3^k is a factor of p?
: : A.10
: : B.12
: : C.14
: : D.16
: : E.18
: : 請問有快速的算法嗎 ANS:C
: : GWD-01-26
: : If the units digit of the three-digit positive integer k is nonzero, what is
: : the tens digit of k?
: : (1) The tens digit of k + 9 is 3.
: : (2) The tens digit of k + 4 is 2.
: : ANS:A
: : GWD-02-02
: : When positive integer x is divided by positive integer y, the remainder is 9.
: : If x/y = 96.12, what is the value of y?
: : A.96
: : B.75
: : C.48
: : D.25
: : E.12
: : ANS:B
: : GWD-02-08
: : The operation $ is defined for all nonzero numbers a and b by a $ b = a/b –
: : b/a. If x and y are nonzero numbers, which of the following statements must
: : be true?
: : I.x $ xy = x(1 $ y)
: : II.x $ y = -(y $ x)
: : III.1/x $ 1/y = y $ x
: : A. I only
: : B. II only
: : C. III only
: : D. I and II
: : E. II and III
: : ANS:E
: : GWD-02-17
: : Q17:
: : If a and b are positive, is (a^-1 + b^-1)-1 less than (a^-1 b^-1)-1?
: : (1) a = 2b
: : (2) a + b > 1
: : ANS:B
: : GWD-02-22
: : A construction company was paid a total of $500,000 for a construction
: : project. The company’s only costs for the project were for labor and
: : materials. Was the company’s profit for the project greater than $150,000?
: : (1) The company’s total cost was three times its cost for materials.
: : (2) The company’s profit was greater than its cost for labor.
: : ANS:C
: : 以上題目都是想很久想不通的
: : 先謝謝各位的幫忙
: 01-02
: C6取2 1
: (1) 女性至少6個，P > ------- = --- ......insufficient
: C10取2 3
: (2) 只知道 P(both women) + P(one man & one woman) > 1/2 ......insufficient
: (1)+(2) 仍然insufficient #
: -------------------------------------------------------
: 01-15
: 你把1~30裡"3的倍數"列出來，看有幾個3的乘積
: 3、6、9、12、15、18、21、24、27、30 共有14個3的乘積 Ans: C #
可以請教一下為什麼是14個三的乘積，不是十個? 不好意思我數學不好
謝謝
: -------------------------------------------------------
: 02-02
: x/y = 96.12 = 96 + 12/100 = 96 + 3/25 = 96 + 9/75
: y = 75 #
這題好酷^^
: -------------------------------------------------------
: 02-08
: I. x $ xy = 1/y - y =\= x(1/y - y) = x(1 $ y)
: II. x $ y = x/y - y/x = - (y $ x)
: III. 1/x $ 1/y = y/x - x/y = y $ x
: 只有 II & III 正確
Ans: E #
這題我還是不懂，可否再加以解釋
謝謝
: -------------------------------------------------------
: 02-22
: 若題目成立題目則 L + M < 350000
: (1) L + M = 3M ， L = 2M ......insufficient
: (2) 500000 - ( L + M ) > L ， 2L + M < 500000 ......insufficient
: (1)+(2) 5M < 500000 ， M < 100000 ，代入(1)則 L < 200000
: L + M < 300000 .......sufficient Ans: E #
所以應該是答案有誤
謝謝C大的指導
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