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The opinions expressed herein are my own personal opinions and do not represent anyone else's view in any way, including those of my employer.
© Copyright 2013
The opinions expressed herein are my own personal opinions and do not represent anyone else's view in any way, including those of my employer.
© Copyright 2013
進階教學(13)—丟一粒骰子4次
丟一粒公正骰子4次，依次得到的點數是a,b,c,d;
求 (a-b)(b-c)(c-d)(d-a) =0 的機率
(詳解):先求
的機率 p‘
|
a |
b |
|
d |
c |
在上面方格中，可能
a,c點數相同: 此時有 6×1x5×5種情形
a,c點數不同: 此時有 6×5x4×4種情形
故
得知本題答案為
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