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2936Extinction Probability from k FoundersIf the extinction probability from one ancestor is q, what is the extinction probability from k independent ancestors?概率简单derivation未尝试面试订阅2937If Each Individual Has One or Two ChildrenSuppose each individual has one child with probability p and two children with probability 1-p. What is the extinction probability?概率简单derivation未尝试面试订阅2938A Supercritical Cubic with a Clean RootEach individual has 0 children with probability 1/2 and 3 children with probability 1/2. Starting from one ancestor, compute the extinction probability.概率困难derivation未尝试面试订阅2939Another Supercritical Two-Point LawEach individual has 0 children with probability 0.4 and 2 children with probability 0.6. Compute the extinction probability.概率中等derivation未尝试面试订阅2940Almost Sure Extinction in Every Subcritical ProcessA Galton-Watson process has offspring mean m<1. What is its extinction probability?概率简单derivation未尝试面试订阅