MathDB
Possibility of all rows and colums sum are even

Source: 2018 Taiwan APMO preliminary

November 10, 2020
combinatoricspossibility

Problem Statement

If we fill 1∼161\sim 16 into 4×44\times4 chessboard randomly. What is the possibility of the sum of each rows and columns are all even?
Back to ProblemsView on AoPS