यदि ₹9,900 की राशि को 20% वार्षिक चक्रवृद्धि ब्याज की दर से अर्धवार्षिक रूप से संयोजित किया जाए, तो 1 वर्ष बाद राशि कितनी होगी?

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RRB NTPC Graduate Level CBT-I Official Paper (Held On: 06 Jun, 2025 Shift 3)
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  1. ₹12,495
  2. ₹11,307
  3. ₹11,979
  4. ₹12,940

Answer (Detailed Solution Below)

Option 3 : ₹11,979
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Detailed Solution

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दिया गया है:

मूलधन (P) = ₹9,900

दर (r) = 20% प्रति वर्ष

चक्रवृद्धि आवृत्ति = अर्धवार्षिक

समय (t) = 1 वर्ष

प्रयुक्त सूत्र:

A = P(1 + r/(100 × n))n×t

जहाँ:

A = मिश्रधन

P = मूलधन

r = ब्याज दर

n = प्रति वर्ष संयोजित की जाने वाली बारंबारता

t = वर्षों में समय

गणना:

n = 2 (अर्धवार्षिक संयोजन)

A = 9,900(1 + 20/(100 × 2))2×1

⇒ A = 9,900(1 + 20/200)2

⇒ A = 9,900(1 + 0.1)2

⇒ A = 9,900(1.1)2

⇒ A = 9,900 × 1.21

⇒ A = ₹11,979

∴ सही उत्तर विकल्प (3) है।

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