667概率中等数值题medium
Biased Corridor Hit Probability 1
题目
A random walk starts at 2, moves +1 with probability 3/5 and -1 with probability 2/5, and stops when it first hits 0 or 7. What is the probability that it reaches 7 before 0?
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提交作答时记录，用于后续平均用时统计。
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