Find the marginal product.

Labour	Total Product	Marginal Product
1	10	10
2	28	?
3	40	?
4	50	?

Correct option is B

Sol: The correct answer is (b) 18, 12, and 10

Given:

Formula used:

Marginal Product (MP) =Total Product (TP) at Current Labour−Total Product (TP) at Previous Labour

Solution:

For Labour 2

​$$MP _2​ =TP _2​ −TP _1​ =28−10=18$$

So, the marginal product for the 2nd unit of labour is 18.​

​​For Labour 3:

​$$MP _3​ =TP _3​ −TP _2​ =40−28=12$$

​​So, the marginal product for the 3rd unit of labour is 12.

​For Labour 4:

​$$MP _4​ =TP _4​ −TP _3​ =50−40=10$$

​​So, the marginal product for the 4th unit of labour is 10.

The marginal products for each level of labour are 10, 18, 12, and 10,