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JEE Mains · Maths · STD 11 - 14. probability

यदि \(10\) भिन्न गेंदें , \(4\) भिन्न बक्सों में यादृच्छया रखी जानी हैं, तो इनमें से दो बक्सों में मात्र \(2\) तथा \(3\) गेंदों के होने की प्रायिकता है 

  1. A \(\frac{945}{2^{11}}\)
  2. B \(\frac{965}{2^{11}}\)
  3. C \(\frac{945}{2^{10}}\)
  4. D \(\frac{965}{2^{10}}\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\frac{945}{2^{10}}\)

Step-by-step Solution

Detailed explanation

Total ways \(=4^{10}=\mathrm{n}\) Number of ways placing exactly 2 and 3 balls in two of these boxes \(=^{4} \mathrm{C}_{2} \times \frac{ 5!}{ 2! {3!}} \times 2! \times^{10} \mathrm{C}_{5} \times 2^{5}=\mathrm{m}\) Required probability…
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