5674脑筋急转弯中等数值题medium
At-Least-One Couple Reunited
题目
Four married women and their four husbands are randomly paired into 4 man-woman dance pairs (a uniform random perfect matching). What is the probability that at least one woman is paired with her own husband?
解题计时
0:00
提交作答时记录，用于后续平均用时统计。
你的答案