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What is the order of the matrix \(A=\begin{bmatrix}1&2&3\\4&5&6\end{bmatrix}\)?

Answer and explanation

Correct answer: \(2\times3\)

The governing definition is that the order of a matrix is written as the number of rows multiplied by the number of columns. In the given matrix, the first horizontal row contains 1, 2, and 3, while the second horizontal row contains 4, 5, and 6. Therefore, there are 2 rows. Each row contains 3 entries, so the matrix has 3 columns. Hence its order is 2 × 3, making option A correct. Option B reverses the conventional order by writing columns before rows. Options C and D are incorrect because they describe square matrices, whereas a square matrix must have equal numbers of rows and columns. This matrix is rectangular, not square.

Related tags

MatricesOrder Of A MatrixRows And ColumnsClass 12 MathematicsMatrixMathematicsClass 12 Mcq

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