Two smallest squares are chose at random on a chess board and `p/q` is the probability that they have exactly one corner in common (`p` and `q` are co-prime) then `q-20p=`

Two unit squares are chosen at random on a chess board. Find the probability that they have a side in common.

Two squares are choosen at random on a chess board. Show that the probability that they have a side in common is (1)/(18).

If two of the 64 squares are chosen at random on a chess board, the probability that they have a side in common is

If two of the 64 squares are chosen at random on a chess board,the probability that they have a side in common is

If two of the 64 squares are chosen at random on a chess board, the probability that they have a side in common is

If two of the 64 squares are chosen at random on a chess board, the probability that they have a side in common is

If two of the 64 squares are chosen at random on a chess board, the probability that they have a side in common is

(i)If four squares are chosen at random on a chess board, find the probability that they lie on diagonal line. (ii) If two squares are chosen at random on a chess board, what is the Probability that they have exactly on corner in common? (iii) If nine squares are chosen at random on a chess board, what is the probability that they form a square of size 3x3?