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closed as a duplicate of: GATE CSE 2004 | Question: 76
In an MxN matrix such that all non-zero entries are covered in a rows and b columns. Then the maximum number of non-zero entries, such that no two are on the same row or column, is

A) a + b

B) max {a, b}

C)  min {M-a, N-b}

D)  min {a, b}
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VIDYADHAR SHELKE 1 asked May 30, 2018
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If $A$ and $B$ are matrices of order $4 \times 4$ such that $A= 5B$ and determinant of $A = X$. (determinant of $B$), then $X$ will be$5$$25$$125$$625$