JAMB Economics 2014 Paper

Concept:Use the relationships: Total product = labour × average product, and marginal product = change in total product ÷ change in labour.Explanation:From the table, E is the total product when the unit of labour is 3 and the average product is 9.So, $E = 3 \times 9 = 27$.F is the marginal product between the 4th unit of labour and the 3rd unit of labour.Total product at 4 units is 28, while total product at 3 units is 27.So, $F = \frac{28 - 27}{4 - 3} = \frac{1}{1} = 1$.Answer:The values are $E = 27$ and $F = 1$.Correct option: A.