Formula for price elasticity of demand is
A. $$\frac{{{Q_1} - {Q_0}}}{{{P_1} - {P_0}}} \times \frac{{{P_1} + {P_0}}}{{{Q_1} + {Q_0}}}$$
B. $$\frac{{\Delta Q}}{{\Delta P}} \times \frac{P}{Q}$$
C. $$\frac{{dQ}}{{dP}} \times \frac{P}{Q}$$
D. $$\frac{{\frac{{\Delta P}}{P}}}{{\frac{{\Delta Q}}{Q}}}$$
Answer: Option B

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