
(a)
Graphical representation of total utility.

Explanation of Solution
No. of utils | Total Utility | |
1st | 300 | 300 |
2nd | 250 | 550 |
3rd | 220 | 770 |
4th | 160 | 930 |
5th | 100 | 1030 |
6th | 50 | 1080 |
7th | 20 | 1100 |
8th | 0 | 1100 |
9th | -250 | 850 |
Total Utility is defined as the aggregate of total satisfaction that a consumer consumes for a specific good or service.
Marginal utility is defined as the addition to the total utility which is derived after consuming an additional unit.
(b)
Graphical representation of Marginal utility.

Explanation of Solution
Marginal utility is the addition to total utility when one more unit of good is consumed.
(c)
Marginal utility value at which total utility reach a maximum.

Explanation of Solution
At 8TH unit, total utility is at its maximum and marginal utility is 0.
Marginal utility is the addition to total utility when one more unit of good is consumed.
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