Answer:
80 utils
Explanation:
Marginal utility (MU) is the extra or additional utility received from consuming an additional unit of a good.
From the question, we have:
MU from consuming the third unit of Z = Total utility from consuming three units of good Z - Total utility from consuming two units of good Z = 400 - 320 = 80 utils
Therefore, the marginal utility received from consuming the third unit of good Z is 80 utils.
