एक विक्रेता ₹1 में 5 चॉकलेट बेचकर 20% का लाभ प्राप्त करता है। उसने ₹1 में कितनी चॉकलेट खरीदी थीं?

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RRB NTPC Graduate Level CBT-I Official Paper (Held On: 06 Jun, 2025 Shift 3)
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  1. 12
  2. 6
  3. 8
  4. 10

Answer (Detailed Solution Below)

Option 2 : 6
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दिया गया है:

एक विक्रेता ₹1 में 5 चॉकलेट बेचकर 20% का लाभ प्राप्त करता है। 

प्रयुक्त सूत्र:

1 चॉकलेट का विक्रय मूल्य (SP) = ₹1/5

1 चॉकलेट का क्रय मूल्य (CP) = SP ÷ (1 + लाभ%)

₹1 में खरीदी गई चॉकलेटों की संख्या = ₹1 ÷ CP

गणना:

1 चॉकलेट का विक्रय मूल्य (SP) = ₹1/5 = ₹0.2

चॉकलेट का CP = SP ÷ (1 + लाभ%)

⇒ CP = 0.2 ÷ (1 + 20/100)

⇒ CP = 0.2 ÷ 1.2

⇒ CP = ₹0.1667

₹1 में खरीदी गई चॉकलेटों की संख्या = ₹1 ÷ ₹0.1667

⇒ चॉकलेटों की संख्या = 6

∴ सही उत्तर विकल्प (2) है।

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