Which expression correctly states the conventional order of matrix dimensions?

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Multiple Choice

Which expression correctly states the conventional order of matrix dimensions?

Explanation:
Sizes of matrices are described by how many rows and how many columns they have, written as rows × columns. If a matrix has m rows and n columns, its size is m × n. For example, a matrix with 2 rows and 5 columns is 2 × 5. The standard way to express the dimensions is rows first, then columns. The diagonal length is a separate property and depends on both dimensions, not how we name the size. So the conventional expression is Rows × Columns.

Sizes of matrices are described by how many rows and how many columns they have, written as rows × columns. If a matrix has m rows and n columns, its size is m × n. For example, a matrix with 2 rows and 5 columns is 2 × 5. The standard way to express the dimensions is rows first, then columns. The diagonal length is a separate property and depends on both dimensions, not how we name the size. So the conventional expression is Rows × Columns.

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