← 返回数学题库
478概率中等derivationmedium

Lazy Random Walk Hitting Time

题目

A particle moves on {0,1,2,3,4,5}\{0, 1, 2, 3, 4, 5\}. At each step from state ii (0<i<50 < i < 5), it stays at ii with probability 13\tfrac{1}{3}, moves to i1i-1 with probability 13\tfrac{1}{3}, and moves to i+1i+1 with probability 13\tfrac{1}{3}. State 00 is reflecting: from 00 the particle moves to 11 with probability 23\tfrac{2}{3} and stays at 00 with probability 13\tfrac{1}{3}. State 55 is absorbing.

Starting from state 00, derive the expected number of steps to reach state 55.

解题计时

0:00

提交作答时记录,用于后续平均用时统计。

你的答案