Mathematics, 07.10.2019 16:10 saabrrinnaaa

Consider an 9-by-9 board and nine rooks of which five are red and four are blue. suppose you place the rooks on the board in nonattacking positions at random. what is the probability that the red rooks are in rows 1,3,5,7, 9? what is the probability that the red rooks are both in rows 1,2,3,4,5 and in columns 1,2,3,4,5?

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Consider an 9-by-9 board and nine rooks of which five are red and four are blue. suppose you place t...