求教gwd第6套数学~

renita12 · 发表于 2013-7-27 11:59:15

Q19:

At a certain company, 25 percent of the employees are male and 50 percent of the employees are sales staff. What is the number of employees at this company?

(1) Exactly 7 of the employees at the company are males who are sales staff.

(2) There are 16 more female employees than male employees at the company.

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.
Answer: B
条件一为什么不满足，不能认为50%-25%对应的就是这7个人吗
谢啦~

renita12 · 发表于 2013-7-27 17:03:15

木有人吗，自己顶~

clairvoan · 发表于 2013-7-28 00:24:36

50%的人里包括了这7个人和女staff，25%的人里包括了这7个人和男的non-staff。所以不能直接减

479523375lian · 发表于 2013-7-28 01:49:21

画图
            ss。    非ss
male。                                  25%
female。                               75%
               50%    50%
中间空白部分不能得出，所以不能算啊，同楼上，有交叉部分

renita12 · 发表于 2013-7-29 12:27:10

clairvoan 发表于 2013-7-28 00:24
50%的人里包括了这7个人和女staff，25%的人里包括了这7个人和男的non-staff。所以不能直接减 ...

明白了，谢啦~

renita12 · 发表于 2013-7-29 12:28:15

479523375lian 发表于 2013-7-28 01:49
画图
ss。非ss
male。 25%

恩恩，明白啦，谢啦~

求教gwd第6套数学~

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