题目
1、一堆硬币，一个机器人，如果是反的就翻正，如果是正的就抛掷一次，无穷多次后，求正反的比例解答：是不是题目不完整啊，我算的是3：1
2、一个汽车公司的产品，甲厂占40%，乙厂占60%，甲的次品率是1%，乙的次品率是2%，现在抽出一件汽车时次品，问是甲生产的可能性
解答：典型的贝叶斯公式，p(甲|废品) = p(甲 && 废品) / p(废品) = （0.4 × 0.01） /（0.4 × 0.01 + 0.6 × 0.02） = 0.25
3、k链表翻转。给出一个链表和一个数k，比如链表1→2→3→4→5→6，k=2，则翻转后2→1→4→3→6→5，若k=3,翻转后3→2→1→6→5→4，若k=4，翻转后4→3→2→1→5→6，用程序实现
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