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WAEC Economics 2012 Question 10

Question 10

Theory of Demand

A decrease in the demand for a product X resulted in a decrease in the demand for another product Y. The demand for X and Y is

  1. A.derived.
  2. B.composite.
  3. C.joint.
  4. D.competitive.
Show the answer and explanation

Answer: C (joint.)

Explanation

The demand for both falls together because they are used together: joint (complementary) demand.