Answer:
the amount an additional worker adds to the firm's total output.
Step-by-step explanation:
The marginal product of an input is the change in total output as a result of the change in output by 1 unit
For example, the table below is the total product of labour
amount of labour output
1 10
2 20
3 40
the marginal product of the 3rd worker = (40 - 20) / (3 - 2) = 20
marginal product of the second worker = (20 - 10) / (2 -1 ) = 10
Average output = total output / labour