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8 years, 1 month ago
7 years, 10 months ago
i think the solution is 6/31 please check it dude
8 years, 1 month ago
Total black squares on chess board are 32.
For the required case, lets say you select any first square, now for selecting 2nd square, you only have 7 choices. So the correct answer should be 7/31
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