Answer
1.
The elasticity of demand =0.25
Given
Qd=50
Qd'=70
P=1
P'=0.20
The elasticity of demand=(change in quantity/average
quantity)/(change in price/average price)
Change in quantity=50-70=-20
average quantity=(50+70)/2=60
change in price=1-0.20=0.8
average price=(1+0.20)/2=1.20/2=0.6
Elasticity of demand=(-20/60)*(0.6/0.8)=-0.25
The elasticity of demand =0.25
The negative sign is an indicator of the negative relationship
between the price and quantity demanded.
2.
The demand is inelastic since the absolute value
of elasticity is less than 1.
3.
Since the demand is inelastic therefore a fall in the price would
decrease the total revenue since the quantity
effect is less.
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