एक वस्तु को ₹8,100 में खरीदा गया था। इसके मूल्य में 40% की वृद्धि की गई है। इसके बाद इसे अंकित मूल्य पर 15% की छूट पर बेचा जाता है। लेनदेन पर प्रतिशत लाभ क्या था?

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RRB NTPC Graduate Level CBT-I Official Paper (Held On: 06 Jun, 2025 Shift 3)
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  1. 20%
  2. 18%
  3. 19%
  4. 17%

Answer (Detailed Solution Below)

Option 3 : 19%
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Detailed Solution

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दिया गया है:

क्रय मूल्य (CP) = ₹8,100

40% की वृद्धि → अंकित मूल्य (MP) = CP + CP का 40%

छूट = अंकित मूल्य पर 15%

प्रयुक्त सूत्र:

अंकित मूल्य = \(CP \times \left(1 + \frac{40}{100}\right)\)

विक्रय मूल्य (SP) = \(MP \times \left(1 - \frac{15}{100}\right)\)

लाभ % = \(\frac{SP - CP}{CP} \times 100\)

गणना:

MP = 8100 × 1.40 = ₹11,340

SP = 11,340 × 0.85 = ₹9,639

लाभ = 9,639 - 8,100 = ₹1,539

लाभ % = (1,539 ÷ 8,100) × 100 = 19%

इसलिए, लेनदेन पर प्रतिशत लाभ 19% है।

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