Question

Suppose that Dunkin Donuts reduces the price of its regular coffee from $2 to $1 per cup, and as a result, the quantity sold per day increased from 10 to 40. Over this price range, the price elasticity of demand for Dunkin Donuts’ regular coffee is:

Answer 1

Answer:price elasticity of demand for Dunkin Donuts’ regular coffee is 1.8

Explanation: Using the midpoint formnulae

Price elasticity of Demand =percentage change in quantity demanded/ Percentage change in price.

Percentage change in quantity = new quantity  - old quantity  / (new quantity + old quantity)/2  x 100

= 40-10/(40+10)/ 2 = 30 /25 = 1.2 x 100 =120%

Percentage change in price  = new price   - old price   / new price + old price)/2   x 100

= 1- 2 / (1+2)/2= -1/1.5x 100 = -66.67 %

Price elasticity of Demand =percentage change in quantity demanded/ Percentage change in price.

= 120%/-66.67%= -1.79 = -1.8

For Price elasticity of demand, the sign is not included and the basis for elasticity is on the value itself . here we can conclude that the Price elasticity of demand for Dunkin donut is 1.8 and elastic because a fall in price led to an increase in amount being sold.