Final answer:
The marginal product of the third painter, calculated from the difference between the output of three painters versus two, is 75 square feet per hour.
Step-by-step explanation:
The question involves calculating the marginal product of a third painter given the productivity of two and three painters. When two painters can paint 200 square feet in an hour and three painters can paint 275 square feet in the same timeframe, the marginal product of the third painter is found by taking the difference between the total output with three painters and the total output with two painters.
The calculation is as follows:
- Total output with three painters: 275 square feet
- Total output with two painters: 200 square feet
- Marginal product of the third painter = 275 - 200 = 75 square feet
Therefore, the marginal product of the third painter is 75 square feet per hour.