Suppose a ten firm industry has total sales of $35 million per year. The largest firm have sales of $10 million, the third largest firm has sales of $4 million, and the fourth largest firm has sales of $2 million. If fifth through tenth largest firms combined have annual sales of $12 million, the fourfirm concentration ratio for this industry is

0.66

Explanation:

the fourfirm concentration ratio is the sum of the concentration ratio of the four largest firms in the industry.

The sales of the second largest firm = $35 million - ( $10 million + $4 million+ $2 million + $12 million ) = $7 million

concentration ratio of firm 1 = $10 million / $35 million = 0.29

concentration ratio of firm 2  = $7 million / $35 million = 0.2

concentration ratio of firm 3 = $4 million / $35 million = 0.11

concentration ratio of firm 4 = $2 million / $35 million = 0.06

Adding the ratios together = 0.66

say it in english maybe we can

a recipe serves 8 people, and calls for 5 lbs of apples and 2 cups of flour. you want to prepare it for 24 people. divide 24 by 8 to get 3, and then multiply your ingredients by 3.

so for 24 people, you'll need 15 lbs of apples, and 6 cups of flour.