Which pair of goods are most likely complements?

Pen and inkCorrect answerYour answerTea and coffeeCorrect answerYour answerButter and margarineCorrect answerYour answerBus rides and train ridesCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer A

Correct answer: A

A pen needs ink: they are used together.
The other pairs can each be used in place of the other: substitutes.

Concept: Spotting complements
Typical timeTypical: 70 s
Your timeYours: —

The rule this testsSubstitutes, complements, normal and inferior goods

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Ten questions from Demand & Its Determinants, at your own pace.

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Ten questions from Demand & Its Determinants, at your own pace.

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Which pair of goods are most likely complements?

Explanation