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JEE Mains · Maths · STD 11 - 14. probability

माना \(\mathrm{S}=\left\{\mathrm{M}=\left[\mathrm{a}_{\mathrm{ij}}\right], \mathrm{a}_{\mathrm{ij}} \in\{0,1,2\}, 1 \leq \mathrm{i}, \mathrm{j} \leq 2\right\}\) एक प्रतिदर्श समष्टि है तथा \(\mathrm{A}=\{\mathrm{M} \in \mathrm{S}: \mathrm{M}\) व्युत्क्रमणीय है \(\}\), एक घटना है। तो \(\mathrm{P}(\mathrm{A})\) बराबर है

  1. A \(\frac{50}{81}\)
  2. B \(\frac{47}{81}\)
  3. C \(\frac{49}{81}\)
  4. D \(\frac{16}{27}\)
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Answer & Solution

Correct Answer

(A) \(\frac{50}{81}\)

Step-by-step Solution

Detailed explanation

\(M\left[\begin{array}{ll} a & b \\ c & d \end{array}\right]\), where \(a , b , c , d , \in\{0,1,2\}\) \(n(s)=3^4=81\) we first bound \(p (\overline{ A })\) \(| m |=0 \Rightarrow ad = bc\) \(ad = bc =0 \Rightarrow \text { no. of }(a, b, c, d)=\left(3^2-2^2\right)^2=25\)…
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