问题　将一条线段任意截成三段 ,三段能围成一个三角形的概率有多大 ?更为一般的情形 ,把一个单位长度截 n次 ,使得截出的( n + 1 )段中没有一段大于 x( x取 12 到 1之间的任意值 )的概率有多大 ?解这类概率问题 ,一般性的方法是考虑所发生的合乎题意要求的全部情况 ,然后除以 What is the probability that a line segment is arbitrarily cut into three segments, and how likely is the three segments to form a triangle? In a more general case, a unit of length is truncated n times so that no segment of the (n + 1) segment is greater than What is the probability that x (any value between x and 12 is between 1 and 1)? To solve such probabilistic problems, the general method is to consider all the situations that have occurred in response to the problem, then divide by