PPF - Increasing Marginal Opportunity Costs and Allocative Efficiency

2. Introductory Economic Models / PPF - Increasing Marginal Opportunity Costs and Allocative Efficiency / Problem 9

Problem 9

If moving from 3 to 4 units of good A on a PPF results in a decrease from 8 to 4 units of good B, what is the marginal opportunity cost of the fourth unit of good A?

5 units of good B

4 units of good B

1 unit of good B

2 units of good B