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标题: 请教：一道数学题Gwd-2-33 [打印本页]

作者: fuhongler 时间: 2008-11-6 07:18 标题: 请教：一道数学题Gwd-2-33

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%

Q9:

What was the price at which a merchant sold a certain appliance?

(1) The merchant’s gross profit on the appliance was 20 percent of the price at which the merchant sold the appliance.

(2) The price at which the merchant sold the appliance was $50 more than the merchant’s cost of the appliance.

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.

Q11:

Is the sum of the integers x and y a prime number?

(1) x is an even prime number.

(2) y is a prime number between 10 and 20.

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.

作者: karen_gao 时间: 2008-11-6 12:06

Q33:

64%-48%=16%, which is the employed females percent of the population .

the result is 16%/64%=25%

作者: karen_gao 时间: 2008-11-6 12:09

Q11, 代入法即可

根据条件1，x=2，

根据条件2，y=11,13,17,19

所以答案E

作者: barmecider 时间: 2008-11-7 21:34

第一题，我选B

第二题，我选C

请问对吗？

作者: orchidbrooks 时间: 2008-11-8 07:11

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?

64%是被雇佣的，48%是被雇佣的男性，题目中没有说“在被雇佣的人中48%是男性”，所以它们俩的百分比应该都是基于全城人数吧，所以被雇佣的女性应该是64%-48%=16%吧？

第二题我也选C

第三题x=2，y可以是11、13、17、19，所以x+y=13、15、19、21，不能确定是否是质数，所以选E吧？

作者: fuhongler 时间: 2008-11-10 07:01

and 48 percent of the population are employed males。是什么意思？

能给出具体算法吗？

答案是：

第一题，选B

第二题，选C

作者: rongmmers 时间: 2008-11-11 07:00

第一题，B

（0.64-048）/0.64=0.25

and 48 percent of the population are employed males。是什么意思？

means that 总人数中0.48的人有被雇佣又是男的！

第二题，抓住利润=价格-成本!

第三题，我先看掉了，(*^__^*) 嘻嘻……，现在我选E，对吗？

作者: fuhongler 时间: 2008-11-13 07:02

是呀，看懂题意是关键啊。多谢了。

11题是E

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