Answer: a. 3
b. 1 and 2
Explanation:
a. Gains from trade are possible only when there are comparative advantages in production of a good. German worker takes 400 hours to produce a car and 2 hours to produce wine. While, a French worker takes 600 hours to produce cars and X hours to produce wine.
Opportunity cost of producing car for a German worker is 200 wine cases.
Opportunity cost of producing wine for a German worker is 1/200 cars.
Gains from trade are possible only when the French worker face a different opportunity cost than the German worker for both the goods.
[tex]200<\frac{600}{x}[/tex]
[tex]x<3[/tex]
Correct option is 3.
b. Germany will export cars and import wine only when it has a comparative advantage in producing cars and France has a comparative advantage in producing wine. This is possible when the opportunity cost of producing cars in Germany is smaller than that of France.
Opportunity cost of car in Germany < Opportunity cost of car in France
[tex]200 < \frac{600}{x}[/tex]
[tex]x<3[/tex]
Therefore, when it take France less than 3 hours to produce a case of wine, Germany will import wine from France and export Cars to France.
Correct options as 1 and 2.