Two workers produce a total of 80 units and three workers produce 90 units. With three workers, what are the average product and the marginal product of the third worker?
Correct answer D. 30; 10
Explanation
Average product with three workers is 90 ÷ 3 = 30, and the third worker adds 90 − 80 = 10 units, which is the marginal product.
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