if 2 black squares are selected on chess board.find the probability they lie on same row or column?

Question

Answer 1

i think the solution is 6/31 please check it dude

Answer 2

i think the solution is 6/31 please check it dude

Answer 3

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

Answer 4

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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if 2 black squares are selected on chess board.find the probability they lie on same row or column?