The POSITION of an element in a matrix is given by the row and column containing the element. This is usually denoted using double subscript notation, “aij” where first number is the row and j is the column containing the element aij.
In your given problem, “1” corresponds to the row, and “2” corresponds to the column. The element in the given matrix that is row 1, column 2 is the element, 7.
Therefore, the correct answer is B) 7.
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