救助.....GWD 1-11, 1-17 救助。。。..................还是没有人解答现在。。

tqfriend

这道题应该如何解呢？答案是d

谢谢

0.5M + 0.4 F = .42 (M+F)

0.5M + 0.4F= .42 M + .42 F

0.5m-.42M = .42f - .4 F

0.08M = 0.02F

    8M = 2F

     4M=1F

答案不是应该是 1F / 4m+1F = 1/5 吗

Q11:

In a corporation, 50 percent of the male employees and 40 percent of the female employees are at least 35 years old.  If 42 percent of all the employees are at least 35 years old, what fraction of the employees in the corporation are females?

 

 

 

 

A.     3/5

B.      2/3

C.      3/4

D.     4/5

E.      5/6

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%

答案是B

[此贴子已经被作者于2008-12-25 1:17:23编辑过]

tqfriend

推 請大家幫幫忙

sausau

你粗心了！
你都知道4m=f，那就是女人的数是男人的4倍。女人占总人数肯定是4/5啊

sausau

第二题
女雇员占全城人数的0.16（0.64-0.48）

问题是，女雇员占所有雇员的比例：0.16/0.64=1/4

你可能是题目看错了。不要粗心哦，多可惜

tqfriend

.....谢谢大侠。。。