Final answer:
The law of diminishing marginal productivity states that the marginal productivity of additional variable resources will eventually fall if at least one resource is fixed, all else being held constant.
Step-by-step explanation:
The law of diminishing returns states that as additional resources are devoted to production, the marginal increase in output will become smaller. Specifically, the law of diminishing marginal productivity states that the marginal productivity of additional variable resources will eventually fall if at least one resource is fixed, all else being held constant. In other words, when the amount of a fixed resource remains the same and additional variable resources are added, the amount of additional output produced will eventually decrease.
For example, let's consider a production process that involves typing. If the number of typists is increased while the number of computers remains the same, the initial addition of typists may increase output. However, after a certain point, the marginal productivity of each additional typist will start to decline, resulting in diminishing marginal productivity.