Question
Why is production possibility curve concave?
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| Item | Weight (in %) | Base Year Price (₹) | Current Year Price (₹) |
| A | 40 | 2 | 4 |
| B | 30 | 5 | 6 |
| C | 20 | 4 | 5 |
| D | 10 | 2 | 3 |
| Quantity Sold (Units) | Total Revenue (₹) | Total Cost (TC) (₹) |
| 5 | 15 | 18 |
| 6 | 20 | 22 |
| 7 | 25 | 26 |
| 8 | 30 | 27 |
| 9 | 35 | 32 |
| 10 | 40 | 38 |
| Student | A | B | C | D | E |
| Marks in Economics | 60 | 48 | 49 | 50 | 55 |
| Marks in Statistics | 85 | 60 | 55 | 65 | 75 |
| Item: | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 |
| Frequency: | 8 | 16 | 18 | 22 | 14 | 9 | 6 | 7 |
| X | $12$ | $10$ | $8$ | $10$ | $11$ | $9$ | $15$ |
| Y | $26$ | $20$ | $24$ | $20$ | $18$ | $22$ | $20$ |
| Output (Units) | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
| Total Cost (₹) | 150 | 300 | 420 | 600 | 790 | 1,000 | 1,260 |