A firm’s marginal product of labor is 4 and its marginal product of ca

A firm’s marginal product of labor is 4 and its marginal product of capital is 5. If the firm adds one unit of labor, but does not want its output quantity to change, the firm should

A) use five fewer units of capital.
B) use 0.8 fewer units of capital.
C) use 1.25 fewer units of capital.
D) add 1.25 units of capital.

 

ANSWER

B

 

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