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Probabilities

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A queen on an English chessboard is able to attack in the same row, column and diagonal. The probability that 2 randomly placed queens on an 8 by 8 chessboard will be able to attack each other can be expressed as a/b , where a and b are positive, coprime integers. What is the value of a+b?

NOTE: The 2 queens will not be placed on the same square

  • Probabilities -

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