Respuesta :

Answer:

4-Firm Concentration ratio = 20%

Explanation:

Each firm has equal share

That means 100% share of the industry is divided equally among the 20 firm

Share of 1 firm = 100/20 = 5%

4-Firm Concentration ratio = Share of 1 firm * Number of firm

4-Firm Concentration ratio = 0.05 * 4

4-Firm Concentration ratio = 0.2

4-Firm Concentration ratio = 20%