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Use the information below to answer the question that follows. When commodity X sold for...

Economics
JAMB 2000

Use the information below to answer the question that follows.

When commodity X sold for N25 per unit, 50 units of commodity Y were purchased. With an increase in the price of commodity X to N50 per unit, the demand for commodity Y fell to 20 units.

Determined the cross elasticity of demand?

  • A. 1.7
  • B. 0.6
  • C. -0.6
  • D. -1.7
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Correct Answer: Option C
Explanation

Cross elasticity of demand shows the way that the changes in the price of one good can affect the quantity demanded of another good.

CED = \(\frac{\text { % change in demand of product Y} }{\text { % change of price of product X}}\)

% ∆ demand of y = 50 - \(\frac{25}{25}\) × 100

= \(\frac{25}{25}\) × 100 = 100

% ∆ price of x = 20 - \(\frac{50}{50}\) × 100

= - \(\frac{30}{50}\) × 100 = - 60

CED = \(\frac{\text {% ∆ demand of y}}{\text {%∆ price of x}}\)

= - \(\frac{-60}{100}\)

=  - 0.6


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