-Sam's total utility for bananas is in the table above.Sam's marginal utility from the fourth banana is
A) 100
B) 25
C) 20
D) 15
E) It cannot be determined from the given information.

Question

-Sam's total utility for bananas is in the table above.Sam's marginal utility from the fourth banana is
A) 100 
B) 25 
C) 20 
D) 15 
E) It cannot be determined from the given information.

Quizplus · Accepted Answer

The marginal utility from the fourth banana is the change in total utility from consuming the third to the fourth banana. If the total utility for the third banana is 60 and for the fourth banana is 80, the marginal utility is 80 - 60 = 20.

-Sam's Total Utility for Bananas Is in the Table Above