【紧急求助]】GWD几道题

xiaoy791

Q33:

In Town X, 64 percent of the population are employed, and 48 percent of the population are employed males.  What percent of the employed people in Town X are females?

 

A.    16%

B.     25%

C.     32%

D.    40%

E.     52%

我晕，这道题答案是B，真诚求教！

Q5:

In the figure, points A, B, C, D, and E lie on a line.  A is on both circles, B is the center of the smaller circle, C is the center of the larger circle, D is on the smaller circle, and E is on the larger circle.  What is the area of the region inside the larger circle and outside the smaller circle?

(1)     AB = 3 and BC =2

(2)     CD =1 and DE = 4

                  

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

答案是D，图贴不上去，麻烦大家自己画一下，

Q25:

A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.  If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?

 

A.    0

B.     1/9

C.     2/9

D.    1/3

E.     1

答案是C，我凑出来了，但不知怎么列式计算

微笑红尘

Q33：问题很tricky: X城里女性雇员占雇员总数的百分比。因此是（64％－48％）/64％＝25％

Q5：刚在google上搜了下,发现有A有D，曼哈顿论坛还有的说答案选E……
    个人思路：这道题如果要自己画图，会发现有两种情况，关键在于D点的位置，即AC和AD的大小关系。
    （1）当AB＝3且BC＝2时，只有一种情况AC<AD（五个点的排列顺序依次为：ABCDE）。R＝AC＝5,r＝AB＝3。此时，S只有一个值。
    （2）当CD＝1且DE＝4时，分为两种情况
      － AC<AD，R＝AC＝5,r＝AB＝3。
      － AC>AD, R＝AC＝4,r＝AB＝1.5。
     此时，S有确定的两个解。
     不晓得原题的图有没有类似于drawn to scale这样的字眼。。。

Q25:（3/3）*（2/3）*（1/3）＝ 2/9 （一共坐三次，每座坐一次：一次随便坐，二次剩两个，三次没选择）

xiaoy791

[attachimg]67919[/attachimg]

这是Q5的图，看不清楚的话点击一下图片，谢谢！

[此贴子已经被作者于2008-10-16 10:30:35编辑过]