Question

If $A=\left[\begin{array}{ccc}2& 4& 5\\ 4& 8& 10\\ -6& -12& -15\end{array}\right]$. Then rank of $A$ is equal to :

• A. 0
• B. 1
• C. 2
• D. 3

Answer 1

Answer: (B)

Correct answer is (b) 1