Answer:
Explanation:
The output of first worker was 10 units . The addition of one worker adds 5 units to the total production which is less than output of first worker . This happens due to law of diminishing marginal return. When a third worker is added to the workforce , this time less than 5 units like 4 or 3 units will be added to the total production . So total production may range from 15 to 19 units due to possible addition of units , ranging from 0 to 4 units.