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:

The four-firm concentration ratio for industry B is 1.00

Explanation:

Concentration ratio: It is a ratio which shows a relationship of total sales of each firm with the total industry sales

In mathematically,

Concentration ratio = (Total sales of each firm) ÷ (total industry sales)

where,

Total sales of each firm = $2.5 million + $2.5 million + $2.5 million + $2.5 million = $10.00 million

And, the industry sales = $5 million + $2 million + $1 million + $1 million + $1 million = $10.00 million

Now put these values to the above formula  

So, the ratio would equal to

= $10 million ÷ $10 million

= 1.00

answer; standing committee;

hi : ) i found this so i hope this !

"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"