GATE 2019 EE – Question 34
The rank of the matrix $M=\begin{bmatrix}0&1&1\\1&0&1\\1&1&0\end{bmatrix}$ is ________.
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Correct answer: 3
Explanation
The determinant is $0(0-1)-1(0-1)+1(1-0)=2\ne0$, so the matrix has full rank, 3.