- #1
Lilia
- 48
- 0
Doing my combinatorics homework, I just thought that I've made a mistake. When counting the number of ways to place two black and one white rooks on a chess board, I placed the black rooks on black squares and the white one- on a white square? So I chose C(32,1) for the first took. Is that correct? Or it's correct to choose the first square in C(64,1) ways and so on?