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JEE Mains · Maths · STD 11 - 6. permutation and combination

माना \(A=\left[a_{i j}\right], a_{i j} \in Z \cap[0,4], 1 \leq i, j \leq 2\) है। ऐसे आव्यूहों \(\mathrm{A}\), जिनके सभी अवयवों को योग एक अभाज्य संख्या \(\mathrm{p} \in(2,13)\) है, की संख्या है____________.

  1. A \(203\)
  2. B \(202\)
  3. C \(201\)
  4. D \(204\)
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Answer & Solution

Correct Answer

(D) \(204\)

Step-by-step Solution

Detailed explanation

As given \(a+b+c+d=3\) or \(5\) or \(7\) or \(11\) \(\text { if sum }=3\) \(\left(1+x+x^2+\ldots++x^4\right)^4 \rightarrow x^3\) \(\left(1-x^5\right)^4(1-x)^{-4} \rightarrow x^3\) \(\therefore{ }^{4+3-1} C_3={ }^6 C_3=20\) If \(\operatorname{sum}=5\)…
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