試題詳解

2. Suppose the price of product X is reduced from $].4S to $1.25 and, as a result, the quantity of X demanded increases from 2,000 to 2,200. Using the midpoint method, the price elasticity of demand for X in the given price range
(A) 2.00.
(B) 1:55.
(C) 1.00’
(D) 0.64.