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WAEC Economics 2019 Question 13

Question 13

Theory of Supply

Two commodities X and Y are in joint supply when

  1. A.X is a by-product of Y.
  2. B.X and Y are produced by the same process.
  3. C.increase in quantity of X leads to decrease in Y.
  4. D.X and Y cannot be produced in the same firm.
Show the answer and explanation

Answer: B (X and Y are produced by the same process.)

Explanation

Jointly supplied goods come out of the same production process.