67. In a perfectly competitive market, industry demand is given by Q = 1000 – 20P. The typical firm’s average cost is TC = 300 + Q2 /3, and marginal cost by MC = (2/3)Q. Suppose there are 10 identical firms in the market. What is the market supply? A. 30Q B. 40Q C. 15Q D. 5Q

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Chapter1: Making Economics Decisions
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67. In a perfectly competitive market, industry demand is given by Q = 1000 – 20P. The typical firm’s average cost is TC = 300 + Q/3, and marginal cost by MC = (2/3)Q.

Suppose there are 10 identical firms in the market. What is the market supply?

A. 30Q
B. 40Q
C. 15Q
D. 5Q
**Understanding Market Supply in a Perfectly Competitive Market**

In a perfectly competitive market, the industry's demand is represented by the equation: 

\[ Q = 1000 - 20P \]

where \( Q \) is the quantity demanded and \( P \) is the price level.

The typical firm's average cost (AC) is given by the equation: 

\[ TC = 300 + \frac{Q^2}{3} \]

where TC stands for total cost.

Additionally, the marginal cost (MC) for each firm is represented by: 

\[ MC = \frac{2}{3}Q \]

*Question:*

Suppose there are 10 identical firms in the market. What is the market supply?

*Options:*

- 30Q
- 40Q
- 15Q
- 5Q

**Explanation:**

To determine the market supply, one must calculate the supply from a single firm and then multiply it by the number of firms (10 in this case) since they are identical. Consider the given marginal cost equation to identify the supply function and solve accordingly to find the correct market supply option.
Transcribed Image Text:**Understanding Market Supply in a Perfectly Competitive Market** In a perfectly competitive market, the industry's demand is represented by the equation: \[ Q = 1000 - 20P \] where \( Q \) is the quantity demanded and \( P \) is the price level. The typical firm's average cost (AC) is given by the equation: \[ TC = 300 + \frac{Q^2}{3} \] where TC stands for total cost. Additionally, the marginal cost (MC) for each firm is represented by: \[ MC = \frac{2}{3}Q \] *Question:* Suppose there are 10 identical firms in the market. What is the market supply? *Options:* - 30Q - 40Q - 15Q - 5Q **Explanation:** To determine the market supply, one must calculate the supply from a single firm and then multiply it by the number of firms (10 in this case) since they are identical. Consider the given marginal cost equation to identify the supply function and solve accordingly to find the correct market supply option.
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