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`        in+how+many+ways+can+you+choose+3 small+squares+on+chess+board+so+that+none+of+them+are+in+same+row,+ column+or+diagonal+line+by+combinations+and+permutations`
6 years ago

SAGAR SINGH - IIT DELHI
879 Points
```										Dear student,
In a square board there are 8 rows and 8 columns, now use the basic property of P and C

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Sagar Singh
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6 years ago
Sudheesh Singanamalla
114 Points
```

Total number of squares on a chessboard are 64 i.e 8*8
Number of ways we can choose 3 squares = 64C3
number of ways we can choose 3 squares so that they are in the same column is 8C3 * 8 * 3! =48 * 8C3
number of ways we can choose 3 squares in same row = 48 * 8C3
number of ways we can choose 3 squares in same diagonal = 8*8C3
so number of ways we can choose 3 squares so that they are not in the same row or column or diagnal is 64C3 - 48*8C3 - 48*8C3 - 8*8C3

```
6 years ago
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