Given the following production chart, where the total output with 4 workers is 80 units and with 5 workers is 90 units, what is the marginal product of labor (MPL) of the fifth worker?

• A. 80 units
• B. 90 units
• C. 5 units
• D. 10 units

Answer: (D)

Verified step by step guidance

1. Understand that the Marginal Product of Labor (MPL) measures the additional output produced by adding one more worker, holding other inputs constant.
2. Identify the total output when there are 4 workers, which is given as 80 units.
3. Identify the total output when there are 5 workers, which is given as 90 units.
4. Calculate the MPL of the fifth worker by subtracting the total output with 4 workers from the total output with 5 workers using the formula: \(MPL_5 = Q_5 - Q_4\) where \(Q_5\) is output with 5 workers and \(Q_4\) is output with 4 workers.
5. Interpret the result as the additional units produced by the fifth worker.