A carpenter hammers nails each day at work.The average number of nails hammered over the first three hours is 50,and the marginal product of the fourth and fifth hours of work is 40 and 20 nails,respectively.The total output after five hours work is _____ nails.
A)150
B)110
C)210
D)60

Question

Quizplus · Accepted Answer

The average number of nails hammered over the first three hours is 50, which means that the total nails hammered in the first three hours is 150 (50 x 3).
The marginal product of the fourth hour is 40 nails, so the total number of nails hammered in the fourth hour is 40.
The marginal product of the fifth hour is 20 nails, so the total number of nails hammered in the fifth hour is 20.
Therefore, the total number of nails hammered in five hours is 150 + 40 + 20 = 210. Thus, the answer is (C) 210.

A Carpenter Hammers Nails Each Day at Work