Suppose the Market for Good X Has a Four-Firm Concentration

Multiple Choice

Suppose the market for good X has a four-firm concentration ratio of 0.80.Having worked for the four largest firms in the industry,you know the sales for these four firms are given by $100,000,$125,000,$150,000,and $175,000.Based on this information,we know that sales for the remaining firms in the industry are:

A) $687,500.
B) $550,000.
C) $250,500.
D) $137,500.