请教NN个数学题吧,惭愧:

Q30:

What is the median number of employees assigned per project for the projects at Company Z?

(1)   25 percent of the projects at Company Z have 4 or more employees assigned to each project.

(2) 35 percent of the projects at Company Z have 2 or fewer employees assigned to each project.

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c，可我不明白。。。

答案是C应该没错

此题主要是理解题意，题目问的是：对于所有的项目每一个项目被分配的员工数的中间数是多少？根据条件1，可得出25%的项目每个项目被分配的员工数为4个或者4个以上；根据条件2，35%的项目每个项目被分配的员工数为2个或2个以下；所以根据条件1和2，剩下40%的项目每个项目被分配的员工数应该为3个。而中间数也就是每个项目被分配员工数从小到大排列的中间数，根据条件1和2，这个中间数刚好落在40%的这个部分，也就是3了。

[此贴子已经被作者于2008-11-4 15:40:59编辑过]

1）25%〉=4，说明75%〈4~~，不知道median

2) 35%〈=2，说明65%〉2~,不知道median

1)+2) 35%〈=2，65%〉2，75%〈4，25%〉=4，说明median在中间等于3