b***k
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littleegg (爱吃茶叶蛋) 于 (Wed May 21 10:02:40 2008) 提到:
N coins on the floor, every time you randomly pick one, if it is head, flip
it to tail; if it is tail, toss it. after many many times, what is the ratio
btw head vs. tail coins on the floor?
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shallowater (shalloWater) 于 (Wed May 21 10:42:20 2008) 提到:
1:2
flip
ratio
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littleegg (爱吃茶叶蛋) 于 (Wed May 21 14:04:54 2008) 提 |
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