The concept of the margin (OCR A-Level Economics): Quizzes

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The concept of the margin
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What does 'margin' refer to in economics?

The impact of one more unit

What is marginal utility?

Additional satisfaction from one more unit

What does total utility measure?

Overall satisfaction from total quantity

What principle describes diminishing marginal utility?

Extra satisfaction decreases with more units

What is the formula for marginal cost?

ΔTotal CostΔQuantity\frac{\Delta \text{Total Cost}}{\Delta \text{Quantity}}

How is marginal revenue calculated?

ΔTotal RevenueΔQuantity\frac{\Delta \text{Total Revenue}}{\Delta \text{Quantity}}

If 5 units cost £100 and 6 units cost £120, what is the marginal cost?

£20

If 5 units earn £200 and 6 units earn £230, what is the marginal revenue?

£30

If 2 apples give 15 utility units and 3 apples give 20 units, what is marginal utility?

5 utility units

Why does the demand curve slope downward?

Due to diminishing marginal utility

If MC is £50 and MR is £70 for the 11th widget, should it be produced?

Yes, MR exceeds MC by £20

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