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If the cost of 4 pens and 6 note books is ₹800, then find the cost of 6 pens and 9 note books. |
₹900 ₹1200 ₹1000 ₹1100 |
₹1200 |
Cost of 4 pens and 6 note books = ₹800 Cost of 2 pens and 3 note books = \(\frac{800}{2}\) = ₹400 Cost of 6 pens and 9 note books = ₹400 × 3 = ₹1200
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