俺做一题, A、9只母鸡9天生9个蛋,3只母鸡3天里生几个蛋? 1只鸡蛋 |
I guess most of us who ever cooked must have the experience of breaking eggs -- you know, hold one egg in each of your hands and bump one egg into another until one of them is broken, and then you pick another egg and bump it with the survivor of the first round, and so on -- for those who don't know what I'm talking about, I'm really really jealous of you. Anyway, assume you have taken a glorious and dangerous job of breaking a dozen eggs, question: what is the probability of the first round survivor to survive the second round? and what is the proability for the second round survivor to survive the third round, and so on... For simplicity, let's assume a survivor's physical property (hardness) will not change. |
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