If 5 workers can wash 30 cars a day and 6 workers can wash 33 cars a day,then the marginal product of the 6th worker equals
A) 30 cars a day.
B) 33 cars a day.
C) 5 cars a day.
D) 5.5 cars a day.
E) 3 cars a day.

Question

Quizplus · Accepted Answer

To find the marginal product of an additional worker, we need to find the increase in output when adding one more worker.

The increase in output from 5 to 6 workers is 33 - 30 = 3 cars. Therefore, the marginal product of the 6th worker is equal to 3 cars a day.

So the best choice is E, which is 3 cars a day.

If 5 Workers Can Wash 30 Cars a Day and 6