Which one of the following pair is/are correct

\frac{△ q d}{△ P} \cdot \frac{P}{q d}

- Price elasticity of demand

\frac{△ q x}{△ P y} \cdot \frac{P y}{q x}

- Cross elasticity of demand

\frac{△ q s}{△ P} \cdot \frac{P}{q s}

- Elasticity of supply

All of these

Answer

Answer: Option D

Answer: Option D

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