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The rank of the four-by-five matrix example is three. This is determined by counting the three pivots found in its echelon form.

Conditions: The matrix is the specific four-by-five example discussed in the video.; The matrix has been reduced to echelon form.

The rank of the four-by-five matrix example is three. This is determined by counting the three pivots found in its echelon form.

Conditions: The matrix is the specific four-by-five example discussed in the video.; The matrix has been reduced to echelon form.