Suppose that there are two industries, A and B. There are five firms in industry A with sales at $5 million, $2 million, $1 million, $1 million, and $1 million, respectively. There are four firms in industry B with equal sales of $2.5 million for each firm. The four-firm concentration ratio for industry B is: 

a). 0.9 

b). 1.0 

c). 0.8 

d). 0.7rn

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Ans There are two industries Industry A has five firms with sales 5million 2million 1mi... View the full answer