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In how many ways can you arrange a black and a white rooks on an empty chess board so that either one could take the other

Respuesta :

Answer:70 ways

Step-by-step explanation:Since there are 8 rows and 8 columns on a chess board, we can choose 4 of them for the black rooks in: C (8,4) = 70 ways. Similarly, we can choose 4 rows and columns for the white rooks in another 70 ways.

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