N=1:p=0; N=2:p=1/8; N=3:p=? Can mathematica do the calculation?

N=1:p=0; N=2:p=1/8; N=3:p=? Can mathematica do the calculation?

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送交者: chouqilozi 于 2008-12-15, 10:48:47:

回答: 呼叫昏少尉，设N个0-1之间的随机数之和S，（S　-　0。5N>0.5）的概率是多少？由 JFF 于 2008-12-15, 10:00:22:

according to testtest, N=2:p=1/4. what are u going to say? (无内容) - JFF (0 bytes) 2008-12-15, 13:59:50 (284278)
- I have a problem with S being uniform in [0,N]. (无内容) - chouqilozi (0 bytes) 2008-12-15, 14:29:21 (284284)
  - that is wrong. i overlooked it (无内容) - JFF (0 bytes) 2008-12-15, 14:33:13 (284288)
给两点 mathematica只能做线性外推，这样很快就把概率推得大于1了。 (无内容) - JFF (0 bytes) 2008-12-15, 11:01:38 (284245)
- I mean use methematica do the N-dimension volume calculation. (无内容) - chouqilozi (0 bytes) 2008-12-15, 11:08:28 (284249)