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发帖数: 800 | 1 ☆─────────────────────────────────────☆
lieren (firstblood--pally) 于 (Sun Jan 21 17:31:42 2007) 提到:
Suppose you have a string that is one unit long, and you cut it in two p
laces uniformly distributed. What is the robability you can make a trian
gle out of the three pieces?
If you instead make the second cut on the longest piece, what is then th
e probability you can make a triangle out of the pieces?
第一问，我算的是3/4.
第二问，我感觉，答案应该比3/4大点， 结果我算出来是1/2 + 1/4 * ln2, 小于3
/4.
我算错了嘛？
各位花几分钟做一下吧，谢谢。
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