求解黄皮P250 18归纳题一道。。谢谢

wwc008love

Figures issued by the government of a certain country show that in 1980 the public sector and the private sector each employed the same number of people.Between 1980 and 1984,according to the government,total employment decreased in the public sector more than it increased in the private sector.
If,according to governmental fugures,the unemployment rate in the country was the same in both 1980 and 1984,which of the following statements must be true about this country?
A  fewer people were in labor force,as counted by the government,in1984 than in 1980
B   The competition for the available work increased between 1980 and 1984
C   The govenment's figures for total employment increased between 1980 and 1984
D  The number of people counted by the govenment as unemployed was the same in 1980 and 1984
E  In 1984 more people sought work in the private sector than in the public sector
答案A是怎么推的。。求解

sdcar2010

categories            1980           1984
total population     200              A
private                    90              88
public                      90              83
unemployment%    10%           10%

0.9 * A = 88 +83; A =190

Since 190<200, A is right.

wwc008love

谢谢。。我懂了。。你的解释很详细

科曼尼琪

私人部门不是增加了么   为什么取88？   疑惑，，，，

sdcar2010

You are right. Switch it to 95. A) is right again.

私人部门不是增加了么   为什么取88？   疑惑，，，，

-- by 会员 科曼尼琪 (2011/10/6 9:48:23)