Question
Differentiate between primary data and secondary data.
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| Particulars | Labour | Cement | Bricks and sand | Grit | Iron | Supervision | Total |
| Expenditure(Crore ₹ ) | $10$ | $8$ | $2$ | $6$ | $8$ | $6$ | $40$ |
| Factory | P | Q | R |
| Production (lakh) | 256 | 576 | 1024 |