Essentials of Economics 7th Edition by Gregory Mankiw

Exercise 4

In an hour, David can wash 2 cars or mow 1 lawn, and Ron can wash 3 cars or mow 1 lawn. Who has the absolute advantage in car washing, and who has the absolute advantage in lawn mowing?
A) David in washing, Ron in mowing.
B) Ron in washing, David in mowing.
C) David in washing, neither in mowing.
D) Ron in washing, neither in mowing.