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

\(5\) कोटि के वर्ग आव्यूह की संख्या, जिसमें समुच्चय \(\{0,1\}\) से प्रविष्टियाँ है, ताकि प्रत्येक पंक्ति में सभी अवयवों का योगफल \(1\) तथा प्रत्येक स्तम्भ में सभी अवयवों का योगफल \(1\) है, होगी

  1. A \(225\)
  2. B \(120\)
  3. C \(150\)
  4. D \(125\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(120\)

Step-by-step Solution

Detailed explanation

In each row and each column exactly one is to be placed - \(\therefore\) No. of such materials \(=5 \times 4 \times 3 \times 2 \times 1=120\) Step\(-1:\) Select any \(1\) place for \(1\) 's in row \(1\). Automatically some column will get filled with 0 's. Step\(-2:\) From next…
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