If finding the last stamp to complete your collection makes you happier than finding the first, then:
A) marginal utility is zero.
B) marginal utility is negative.
C) total utility is decreasing.
D) total utility is constant.
E) marginal utility is not diminishing.

Question

Quizplus · Accepted Answer

Marginal utility is not diminishing because the additional satisfaction (utility) from the last stamp is greater than from the first, indicating increasing or at least non-diminishing marginal utility.

If Finding the Last Stamp to Complete Your Collection Makes