gwd 1 11

Kath1985 · 发表于 2010-7-8 09:27:06

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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

Answer: D
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passiona · 发表于 2010-7-8 09:51:22

横着看
0.5m + 0.4f = 0.42(m+f)

沉睡的巨人 · 发表于 2010-7-8 12:32:37

可以算出来男女比例是1：4，答案就很明确了

Kath1985 · 发表于 2010-7-31 16:51:09

還是算不出來我頂多堆到0.5m+0.4M=0.42(M+F)

gwd 1 11

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