यदि किसी बिस्तर का विक्रय मूल्य प्रारंभिक मूल्य का 2 गुना है, तो लाभ, प्रारंभिक लाभ का 11 गुना है। प्रारंभिक लाभ प्रतिशत ज्ञात कीजिए।

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RRB NTPC Graduate Level CBT-I Official Paper (Held On: 06 Jun, 2025 Shift 1)
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  1. 9 %
  2. 9 %
  3. 11 %
  4. 11 %

Answer (Detailed Solution Below)

Option 4 : 11 %
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RRB NTPC Graduate Level Full Test - 01
100 Qs. 100 Marks 90 Mins

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<style type="text/css">.math-tex { font-family: "Times New Roman", serif; font-style: italic; } </style><p><strong>प्रयुक्त सूत्र:</strong></p><p>लाभ = विक्रय मूल्य - क्रय मूल्य</p><p>लाभ प्रतिशत = (लाभ / क्रय मूल्य) <span>×</span> 100</p><p><strong>गणना:</strong></p><p>माना, क्रय मूल्य = C, प्रारंभिक लाभ = P</p><p>प्रारंभिक विक्रय मूल्य = C + P<br> <br> नया विक्रय मूल्य = 2 <span>×</span> प्रारंभिक विक्रय मूल्य = 2 <span>×</span> (C + P)<br> <br> <span>नया लाभ = 11 × प्रारंभिक लाभ = 11P</span><br> <br> नया लाभ = नया विक्रय मूल्य - क्रय मूल्य</p><p>⇒ 11P = 2(C + P) - C</p><p>⇒ 11P = 2C + 2P - C</p><p>⇒ 11P = C + 2P</p><p>⇒ C = 9P</p><p>प्रारंभिक लाभ प्रतिशत = (P/C) <span>×</span> 100</p><p>⇒ (P/9P) <span>×</span> 100</p><p>⇒ (1/9) <span>×</span> 100</p><p>⇒ 11(1/9)%</p><p><strong>∴ प्रारंभिक लाभ प्रतिशत है: </strong><span>11(1/9)%</span></p> - pehlivanlokantalari.com
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