1.

The rank of the matrix \({\rm{M}} = \left[ {\begin{array}{*{20}{c}} 5&{10}&{10}\\ 1&0&2\\ 3&6&6 \end{array}} \right]{\rm{is}}\)

A. 0
B. 1
C. 2
D. 3
Answer» D. 3


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