Solution:Real wage rate is equal to the Marginal Productivity of Labour• The marginal productivity theory of wage states that the price of labour, i.e., wage rate, Is determined according to the marginal product of labour.
• Real wage rate is equal to the Marginal Productivity of Labour.
• The marginal product of labor shows how much output changes as an additional unit of labor is employed.
• The real wage shows how much an employer's variable costs change when an additional unit of labor is employed.