Answer:
248 UTILS
Explanation:
Total Utility is the total satisfaction from consumption of all units of a good.
Marginal Utility is the additional satisfaction from consuming an additional unit of a good.
TU = ΣMU ; MU = TUn - TUn-1
Law of Diminishing Marginal Utility states : A good's units of consumption increase makes it additional satisfaction i.e MU to rise lesser in the successive unit than in the preceding one. Eg - A thirsty person will get higher satisfaction from the 1st glass of water than the 2nd glass.
If the case gIven follows Law of DMU : (Given- MU@4th unit < MU@3rd unit) i.e (56<63) ; Following must would have been the case :
MU@1st unit > MU@2nd unit > MU@3rd unit - First two MUs would at least be 65, 64 (least possible whole no. integer values > 63).
So , Minimum TU (1..4) = ΣMU = 65 + 64 + 63 + 56 = 248 utils