4 boys and 4 girl r 2 b seated in a round table with 8 seats.
1) no 2 boys r seated next 2 each other.
2) all the seats r numbered and a boy A and a girl B r 2 b seated next to each other.
1) 3!4!=144
2) 6!2!*8=11520
这是答案 哪位达人可以帮我解释下?
huh? 我问的是 为什么是 这样的做法 不是!是什么