AP® Microeconomics

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Utility-Maximization for A and B


A consumer spends all her income buying 3 units of good A, and 6 units of good B. The third unit of good A increases total utility for good A from 50 to 60, and the sixth unit of good B increases the total utility for good B from 20 to 30.

If the price of good A is \$5, and the price of good B is \$2, what should the consumer do in order to maximize utility?


Buy more units of good A and fewer units of good B.


Buy fewer units of good A and more units of good B.


Buy more units of both good A and good B.


Buy fewer units of both good A and good B.


Leave buying unchanged.