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```        two squares are chosen at random on a chess board findthe probability that they have common side?

ans:i got the ans as 38/3451..........is this correct ? if not how to do?
```
7 years ago

69 Points
```
Dear   anesh krishna,
64 no of squares and we can choose first square by 64 ways
and second by 63ways.
There are a total of 64 * 63 =  4032
corners have only 2 adjacent squares. we have 4 corners.
total we can choose using corner square are=4*2
another 24 squares along the boundaries they have 3 adjacent squares.
total no= 24*3
the remaing squares are 34 they have 4 adjacent sides.
total= 36*4
number of combinations = (4 * 2) + (24 * 3) + (36 * 4) =  224
= .

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IIT Bombay

```
7 years ago
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