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Profit is maximum when MC=MR Can anyone explain how?
Ref: https://edurev.in/question/431634/Profit-is-maximum-when-MCMR-Can-anyone-explain-how-

At A, Marginal Cost < Marginal Revenue, then for each extra unit produced, revenue will be higher than the cost so that you will generate more.

At B, Marginal Cost > Marginal Revenue, then for each extra unit produced, the cost will be higher than revenue so that you will create less.
Thus, optimal quantity produced should be at MC = MR



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FAQs on MC=MR Proof - CA CPT

1. What is the meaning of MC=MR?
Ans. MC=MR stands for marginal cost equals marginal revenue. It is an important concept in economics that is used to determine the optimal level of production for a firm. When a firm produces an additional unit of a good, the marginal cost (MC) is the cost of producing that additional unit, while the marginal revenue (MR) is the revenue earned from selling that additional unit. The firm should continue producing as long as the marginal cost is less than or equal to the marginal revenue, as this will maximize its profits.
2. How is MC=MR used to determine the level of production?
Ans. MC=MR is used to determine the level of production by comparing the marginal cost and marginal revenue. When MC is less than MR, it means that the firm's costs of producing an additional unit are lower than the revenue it will earn from selling that unit. In this case, the firm should increase its production to maximize its profits. On the other hand, if MC is greater than MR, it means that the firm's costs of producing an additional unit are higher than the revenue it will earn from selling that unit. In this case, the firm should decrease its production to avoid losses.
3. How does MC=MR help in profit maximization?
Ans. MC=MR helps in profit maximization by guiding a firm to produce at the level where its marginal cost equals its marginal revenue. This is because at this level, the firm is maximizing the difference between its total revenue and total cost, which is its profit. If a firm produces beyond the point where MC=MR, its marginal cost will be higher than its marginal revenue, resulting in lower profits. Similarly, if a firm produces below the point where MC=MR, its marginal cost will be lower than its marginal revenue, also resulting in lower profits. Therefore, MC=MR helps in identifying the level of production that maximizes a firm's profits.
4. What are some factors that can affect MC and MR?
Ans. Several factors can affect marginal cost (MC) and marginal revenue (MR). One important factor is the level of production. As a firm increases its production, its costs may rise due to factors such as increased labor or raw material costs, leading to higher MC. Similarly, the revenue earned from selling each additional unit may decrease as the market becomes saturated or competition increases, resulting in lower MR. Other factors that can affect MC and MR include changes in technology, input prices, government regulations, and consumer demand. It is important for firms to analyze these factors when determining their production levels.
5. Can MC ever be greater than MR?
Ans. Yes, MC can be greater than MR in certain circumstances. When MC is greater than MR, it means that the costs of producing an additional unit are higher than the revenue earned from selling that unit. This situation usually occurs when a firm is operating in a highly competitive market or facing declining demand for its product. In such cases, producing more units would result in diminishing returns, leading to higher costs and lower revenue. It is generally not profitable for a firm to produce beyond the point where MC is greater than MR, as it would lead to losses. Therefore, firms should carefully consider their costs and revenue when determining their production levels.
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