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圆上随机取点,在同一个半圆内的概率有多大?
这个问题来自P大刚刚考完的概率论期末(给足了提示,不过没有明确地把背景写出来),在我印象中是一个经典的量化题。 这个问题看起来很难,但是其实只要用到一些简单的技巧,高中生也能看懂。 问题 设 X_1, X_2, \cdots, X_n 是圆上均匀分布的点,求这些点在 ...
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