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Maximizing Consumer Utility Under a Budget Constraint

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Let M(U)a = z = 10 - x and M(U)b = z = 21 - 2y, where z is marginal utility per dollar measured in utils, x is the amount spent on product A, and y is the amount spent on product B.
Assume that the consumer has $10 to spend on A and B -- that is, x + y = 10.
How is the $10 best allocated between A and B?
How much utility will the marginal dollar yield?

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Solution Preview

The consumer maximizes his total utility when MUa = MUb

Let MUa = MUb
10 - x = 21 - 2y
2y = 11 + x ...

Solution Summary

Given a consumer's utility functions and budget for two products, this solution shows how to calculate the consumer's utility-maximizing allocation between the two products in 87 words with calculations clearly shown.