On an 8 × 8 chessboard, a rook is allowed to move any
Chapter 9, Problem 23E(choose chapter or problem)
Problem 23E
On an 8 × 8 chessboard, a rook is allowed to move any number of squares either horizontally or vertically. How many different paths can a rook follow from the bottom-left square of the board to the top-right square of the board if all moves are to the right or upward?
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