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JEE Mains · Maths · STD 12 - 13. probability

દ્રીપદી વિતરણમાં મધ્યક અને વિચરણ અનુક્રમે  \(\alpha\) અને \(\frac{\alpha}{3}\) છે. જો \(P(X=1)=\frac{4}{243}\) હોય તો  \(P ( X =4\) અથવા \(5)\) ની કિમંત મેળવો.

  1. A \(\frac{5}{9}\)
  2. B \(\frac{64}{81}\)
  3. C \(\frac{16}{27}\)
  4. D \(\frac{145}{243}\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\frac{16}{27}\)

Step-by-step Solution

Detailed explanation

\(np =\alpha\) \(npq =\alpha / 3\) From \((1)\) and \((2)\) \(q =1 / 3\) and \(p =2 / 3\) \({ }^{n} C_{1} q^{n-1} p^{1}=\frac{4}{243}\) \(\frac{n}{3^{n}}=\frac{2}{243}\) \(n=6\) \(P (4\) or 5…
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