試題詳解

1. If I get 10 units of pleasure from my first ice cream cone and 2 less units than before from each succeeding cone, I will buy ____ cones and gain _____ units of consumer surplus if the price of a cone is equal to 5 units of pleasure.
(A) 4； 28
(B) 6； 30
(C) 2； 18
(D) 3； 9