Question

The price of good ʺaʺ is $5 and the price of good ʺbʺ is $15. If the marginal utility of good ʺaʺ is 20 then the marginal utility of good ʺbʺ must be to have an optimum combination of goods purchased.

A) 4

B) 20

C) 60

D) 80

Answer

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