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\(\frac{2}{11}\) %
  2. 9 %
  3. 11 %
  4. 11\(\frac{1}{9}\) %

Answer (Detailed Solution Below)

Option 4 : 11\(\frac{1}{9}\) %
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Detailed Solution

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प्रयुक्त सूत्र:

लाभ = विक्रय मूल्य - क्रय मूल्य

लाभ प्रतिशत = (लाभ / क्रय मूल्य) × 100

गणना:

माना, क्रय मूल्य = C, प्रारंभिक लाभ = P

प्रारंभिक विक्रय मूल्य = C + P

नया विक्रय मूल्य = 2 × प्रारंभिक विक्रय मूल्य = 2 × (C + P)

नया लाभ = 11 × प्रारंभिक लाभ = 11P

नया लाभ = नया विक्रय मूल्य - क्रय मूल्य

⇒ 11P = 2(C + P) - C

⇒ 11P = 2C + 2P - C

⇒ 11P = C + 2P

⇒ C = 9P

प्रारंभिक लाभ प्रतिशत = (P/C) × 100

⇒ (P/9P) × 100

⇒ (1/9) × 100

⇒ 11(1/9)%

∴ प्रारंभिक लाभ प्रतिशत है: 11(1/9)%

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