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# In the matrix $A=\begin{bmatrix}2 & 5 & 19 & -7\\35 & -2 & \frac{5}{2} & 12\\\sqrt 3 & 1 & -5& 17\end{bmatrix},$ write The number of elements

$\begin{array}{1 1} 4 \\ 3 \\ 12 \\ 0 \end{array}$

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• Number of elements in a matrix is nothing but the product of rows and columns in a matrix. i.e m×n.
We have a 3x4 matrix. Therefore the number of elements in our matrix is the product of the rows and columns, i.e, 3x4 = 12.