Chess Boxes...
Probability
Level
3
The number of ways of selecting 2 square on a chess board such that they have a side in common is
The answer is 112.
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1 solution
the chess has 8*8 boxes
Each horizontal line has 8 boxes and there are seven ways such that two squares have a side in common.
Same in the vertical lines .
so the total number of ways are
2(7*8)=112