Answer:
-1.25
Explanation:
Data provided in the question:
Price of a item per unit = $50
Marginal cost = $10
Now,
Price = ( 1 + Mark up) × Marginal cost
$50 = ( 1 + Mark up) × 10
$5 = 1 + Mark up
or
Mark up = 4
Also,
Mark up = [tex]\frac{1}{[\textup{-(elasticity of demand)} - 1]}[/tex]
or
4 = [tex]\frac{1}{[\textup{-(elasticity of demand)} - 1]}[/tex]
-(elasticity of demand) - 1 = 0.25
or
Elasticity of demand = -1.25