三孩分 1 个苹果：如何公平
three children but only one apple
题目详情
You have three children, but only one apple. You want to toss a fair coin to determine which child gets the apple. You want each child to be equally likely to get the apple. What is your strategy?
解析
抛两次硬币，令
- HT → 给孩子 1
- TH → 给孩子 2
- HH → 给孩子 3
- TT → 重新开始
因为在“非 TT”的条件下，HT/TH/HH 等概率，所以每个孩子得到苹果概率均为 。