Random Walk on a number line and further cases












0












$begingroup$


i)
A monkey is sitting on 0 on the real line in period 0. In every period t ∈ {0, 1, 2, . . .} it moves 1 to the right with probability p and 1 to the left with probability 1−p, where p ∈ 1 2 , 1 . Let πk denote the probability that the monkey will reach positive integer k in some period t > 0. The value of πk for any positive integer k is



A)p



B)1



C)0



D)p/1-p



ii)
Refer to the previous question. Suppose p = 1/2
and πk
denote the probability that the monkey will reach positive
integer k in some period t > 0. The value of π0 is



(a) 0



(b) 1/2^k



(c) 1/2



(d) 1



The answer key says the answer to both of them is 1. What is the possible mathematical explanation and also the intuition?










share|cite|improve this question









$endgroup$

















    0












    $begingroup$


    i)
    A monkey is sitting on 0 on the real line in period 0. In every period t ∈ {0, 1, 2, . . .} it moves 1 to the right with probability p and 1 to the left with probability 1−p, where p ∈ 1 2 , 1 . Let πk denote the probability that the monkey will reach positive integer k in some period t > 0. The value of πk for any positive integer k is



    A)p



    B)1



    C)0



    D)p/1-p



    ii)
    Refer to the previous question. Suppose p = 1/2
    and πk
    denote the probability that the monkey will reach positive
    integer k in some period t > 0. The value of π0 is



    (a) 0



    (b) 1/2^k



    (c) 1/2



    (d) 1



    The answer key says the answer to both of them is 1. What is the possible mathematical explanation and also the intuition?










    share|cite|improve this question









    $endgroup$















      0












      0








      0


      1



      $begingroup$


      i)
      A monkey is sitting on 0 on the real line in period 0. In every period t ∈ {0, 1, 2, . . .} it moves 1 to the right with probability p and 1 to the left with probability 1−p, where p ∈ 1 2 , 1 . Let πk denote the probability that the monkey will reach positive integer k in some period t > 0. The value of πk for any positive integer k is



      A)p



      B)1



      C)0



      D)p/1-p



      ii)
      Refer to the previous question. Suppose p = 1/2
      and πk
      denote the probability that the monkey will reach positive
      integer k in some period t > 0. The value of π0 is



      (a) 0



      (b) 1/2^k



      (c) 1/2



      (d) 1



      The answer key says the answer to both of them is 1. What is the possible mathematical explanation and also the intuition?










      share|cite|improve this question









      $endgroup$




      i)
      A monkey is sitting on 0 on the real line in period 0. In every period t ∈ {0, 1, 2, . . .} it moves 1 to the right with probability p and 1 to the left with probability 1−p, where p ∈ 1 2 , 1 . Let πk denote the probability that the monkey will reach positive integer k in some period t > 0. The value of πk for any positive integer k is



      A)p



      B)1



      C)0



      D)p/1-p



      ii)
      Refer to the previous question. Suppose p = 1/2
      and πk
      denote the probability that the monkey will reach positive
      integer k in some period t > 0. The value of π0 is



      (a) 0



      (b) 1/2^k



      (c) 1/2



      (d) 1



      The answer key says the answer to both of them is 1. What is the possible mathematical explanation and also the intuition?







      random-walk gambling






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Dec 24 '18 at 8:14









      Vasu VikramVasu Vikram

      11




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