Answer:
Buy another copier
Explanation:
Given that
20 workers = 8 copiers
20 workers = 11 copiers = output rise by 150,000 pages per day
26 workers = 11 copiers = output another rise by 60,000 pages per day
Now for 3 copiers, the output rise by 150,000
For 1 copier it would be rise by 50,000
And, for extra 6 workers, the output rise by 60,000
So for extra 1 worker, it would rise by 10,000
So it can be said that
When 1 copier is acquired than output rise by 50,000
And, the company could hire 2 workers, so 2 workers, the output would be 20,000
i.e.
50,000 > 20,000
Therefore buying another copier should be best recommended as marginal productivity of copier is greather than the marginal productivity of labor