GRE 舊題 - CR 題型

[vantreal]

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 government figures, the unemployment rate in this country was the same in both 1980 and 1984, which of the following must be true about this country?

(A) Fewer people were in the labor foces, as counted by the government, in 1984 than in 1980.

(B) The competition for the available work increased between 1980 and 1984.

(C) The government's figures for total employment increased between 1980 and 1984.

(D) The number of people counted by the government 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.

Answer: (A)
But why is (C) wrong?

[dibert8]

代數字進去算:

假設
In 1980,
public sector employment = 40 people
private sector employment = 40 people
total labor force = 100 people
total employment = 40 + 40 = 80 people
unemployment rate = 1- 40/100 - 40/100 = 20/100

In 1984,
public sector employment = 10 people
private sector employment = 50 people
total labor force = z people
20/100 = 1- 10/z - 50/z , => z = 75 < 100; this gives (A) a vote.
unemployment = 75 - 10 - 50 = 15 people
total employment = 10 + 50 = 60 < 80; that's why (C) is wrong.

[vantreal]

ok, i got it, thx ~