Answer: The average product equals to marginal product at 20.
Step-by-step explanation:
Number of employees = 41
total output = 820
Average product = 820 / 41 = 20
Now, Find marginal product,
Marginal product = Change in output / Change in input.
= (820 - 800) / (41 - 40)
= 20 / 1
= 20