Diana has one free hour to practice the piano for an upcoming school concert, work at the school library for $11 per hour, or babysit for her neighbor’s 12-year-oldson for $15 per hour. She chooses to practice the piano. What is her opportunity cost of practicing the piano?
The opportunity cost would be $26 because she chose not to participate in the other activities.
The opportunity cost would be $15 because it would be the most profitable alternative
The opportunity cost would be $4 because it is the monetary difference between the two alternative choices
Without knowing the marginal value of practicing the piano, there is no way of knowing the true opportunity cost