[0,1]中均匀分部,取3个数,能组成三角形的概率是多少.
答案据说是0.5......但不知如何得来.
0.5, obivously
construct a unit cube, then you need a+b
c>=a+b excludes 1/6 of the volume, so does the other two condition by
symmetricity.
so the total volume remained is 1/2.
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