l****y
发帖数: 92 | 1 【 以下文字转载自 Quant 讨论区 】
发信人: leephy (leephy), 信区: Quant
标 题: two probability problems?
发信站: BBS 未名空间站 (Mon Feb 18 21:12:43 2008)
1) suppose U is a continuous uniform [0,1] random variable. what is the
probability that the decimal expansion of U contains no fives?
2) a stock is currently worth $100, assume that each of the next 10 days the
stock either increases or decreases in value by $1. what is the probability
that over the next 10 days, the stock reaches a maximum value of $104 and
on day 10 |
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