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If a matrix has order \(m\times n\), how many elements does it contain?

Answer and explanation

Correct answer: \(mn\)

The number of elements equals the number of rows times the number of columns. For a matrix with \(m\) rows and \(n\) columns the total elements are \(m\times n\), i.e. \(mn\). Option A (\(m+n\)) incorrectly adds rows and columns instead of multiplying them; B (\(m-n\)) and D (\(m/n\)) are also incorrect because subtraction or division do not count grid entries. Exam tip: for a square matrix of order \(n\times n\) the total elements are \(n^2\).

Related tags

MatricesElementsOrderRows-ColumnsGeneral-OrderOrder Of A MatrixMatrixMathematics

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