12个色子扔一次和1个色子扔12次得到的概率一样吗?

来源:百度知道 编辑:UC知道 时间:2024/05/04 11:52:55
比如求6不出现的概率,一样吗?谢谢
if you throw 12 dice what is
(1)the probability of getting 0 sixes
(2)the probability of getting 1 six
(3)what is the most likely number of sixes
怎么做?

回答:

一样。

(1) The probability for each dice not to get six is (5/6), so for 0 sixes out of 12 dices, the probability is

(5/6)^12 ≈0.1122

(2) The probability of getting 1 six is

C(12, 1) x (1/6)^1 x (5/6)^(12-1) ≈ 0.2692

(3) The most likely number of sixes is the expected number, i.e.,

12 x (1/6) = 2.

一样
(1)抛第一个色子后6不出现的概率是5/6,抛其它色子也是一样。那么第一种方法不出现的概率就是每次概率的积。(2)第一次抛色子6不出现的概率是5/6,之后几次中不出现的概率也是5/6,第二种还是它们的积
有些数学问题就是生活常识

是的,在绝对公平,绝对随机的情况下,概率是相等的