GWD31-1-2;GWD31-1-17;GWD31-1-32

这几题都没有搜索到，刚开始做GWD就遇到困难，请牛牛们帮忙：

Q2:

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

The key is C, why not B.

Q17:

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%

I choosed A, but the answer is B.

Q32:

For a convention, a hotel charges a daily room rate of $120 for 1 person and x dollars for each additional person.  What is the charge for each additional person?

(1)     The daily cost per person for 4 people sharing the cost of a room equally is $45.

(2)   The daily cost per person for 2 people sharing the cost of a room equally is $25 more than the corresponding cost for 4 people.

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.

The key is D, why?

搜到的题目不对应呀

【建议】

1. 发帖需一题一帖，不要把很多题放在一个帖内。这样做有几个好处：

a)  增加自己的发帖数和积分数。
b)  增大回帖的可能性。问题一下子太多可能会把别人吓跑。
c)  便于版主对帖子的归纳和整理。

2. 提问同时写出自己的思路和具体的疑问，这样：

a) 能够获得有针对性的答案，使自己更好的得到提高
b) 方便其他人的讨论和释疑

谢谢大家支持与配合!！

具体的问题明天帮你看 

Q2

分母：每次坐都有任意三个车可以选，所以为3×3×3

分子：第一次坐可以任意选车，即3中可能；设第一次坐的是A车，第二次坐可以选除A以外的两个中的任一个，即2种；第三次没得选，1种。所以为3×2×1

所以：3×2×1/（3×3×3）＝2/9

Q17

16%是employed female占总人口的比重

题目问的是What percent of the employed people in Town X are females? 分母是employed people而非全部人口

故为16％ / 64% =B