BITSAT2020MathematicsPermutation and CombinationActual
Total number of ways of selecting 2 white squares on a normal chess board if the squares are not from the same row or column is equal to
Options
- A480
- B496
- C412
- D400
Correct answer
D. 400
Step-by-step solution
2 white squares can be selected in ³² C ₂ ways If they belong to some row or same column then 2 (8 ⁴ C ₂ ) ways.