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CA Foundation · Business Economics · Theory of Demand and Supply

The price of petrol rises sharply in India. Other things being equal, what is the most likely effect on the demand for new petrol-driven scooters?

Demand for petrol scooters shifts leftward. Petrol is a complement to scooters, so a higher petrol price raises the cost of use and reduces demand at every scooter price. This is a shift of the curve, not a movement along it, because the scooter's own price is unchanged.

  1. AMovement along the demand curve upward because the scooter price has risen
  2. BRightward shift of the demand curve for scooters
  3. CNo change, because petrol and scooters are unrelated
  4. DLeftward shift of the demand curve for scootersCorrect

Explanation

Petrol and petrol scooters are complements, so a rise in the price of petrol raises the running cost of scooters and lowers their demand at every price. This is a leftward shift of the demand curve. It is not a movement along the curve since the scooter's own price has not changed.

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