joint demand : pencil and paper ::. : electricity
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Bulb is the answer.
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Tapa tap tapa tap tapa tapa tapa.
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pencil and paper : : electricity and electric appliance.
- Joint demand is the demand for two goods that work together to provide utility to the consumer.
- Pen and paper is a joint demand because we need a pen to write on a piece of paper. We can only write on paper and use a pen to write on that paper.
- Electricity and electric appliance are joint demand because to use an electrical appliance we need electricity.
- Without electricity, the appliance will not be able to operate on its own.
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