Zachary plays the piano for a half hour and gains utility of 7.He then watches TV for a half hour,then goes back to playing the piano again.Using the concept of utility to explain his choices,we can say:
A)the utility gained from watching TV was greater than playing the piano for a second half hour.
B)Zachary revealed his preference for TV over a second half hour of playing piano.
C)Zachary enjoys playing the piano for a half hour more than watching TV for a half hour.
D)All of these are true.

Question

Quizplus · Accepted Answer

Zachary gained utility of 7 from playing the piano for a half hour, and he went back to playing the piano after watching TV for a half hour. This indicates that he enjoys playing the piano more than watching TV, and that the utility gained from watching TV was not greater than playing the piano for a second half hour.

Zachary Plays the Piano for a Half Hour and Gains