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প্রথম 120টি বিজোড় স্বাভাবিক সংখ্যার গড় হল:

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  1. 121
  2. 120
  3. 120.5
  4. 119.5

Answer (Detailed Solution Below)

Option 2 : 120
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প্রদত্ত:

প্রথম 120টি বিজোড় স্বাভাবিক সংখ্যা।

ব্যবহৃত সূত্র:

n বিজোড় স্বাভাবিক সংখ্যার গড় = (n বিজোড় সংখ্যার যোগফল) / n

প্রথম n বিজোড় স্বাভাবিক সংখ্যার যোগফল = n2

গণনা:

এখানে, n = 120

প্রথম 120টি বিজোড় স্বাভাবিক সংখ্যার যোগফল = 1202

⇒ যোগফল = 120 × 120 = 14400

গড় = যোগফল / n

⇒ গড় = 14400 / 120

⇒ গড় = 120

প্রথম 120টি বিজোড় স্বাভাবিক সংখ্যার গড় হল 120।

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