673概率中等数值题medium
Scaled-Step Exit Time 3
题目
A fair random walk starts at 3 and moves by +3 or -3 with equal probability each step. It stops when it first hits -9 or 9. What is the expected stopping time?
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0:00
提交作答时记录，用于后续平均用时统计。
你的答案
题目
A fair random walk starts at 3 and moves by +3 or -3 with equal probability each step. It stops when it first hits -9 or 9. What is the expected stopping time?
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