作者nourri (nourri)
看板Statistics
標題[問題] 擲骰子的條件機率
時間Mon Oct 11 11:40:19 2010
不好意思
有一個很簡單的問題一直搞不懂><
A pair of four sided dice is rolled and the sum is determined.
In a sequence of rolls the probability that a sum of 3 is rolled before a
sum of 5 is rolled can be thought of as the conditional probability of a sum
of 3 given that a sum of 3 or 5 has occurred.
雖然上面教了方法
但是我搞不懂為什麼可以這樣解釋
懇請高手賜教 謝謝
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1F：推 tyjgary:independent 10/13 14:05
2F：推 tyjgary:因為 sum=3 or sum=5 發生事件就決定了. 10/13 14:16
3F：→ tyjgary:而發生 sum=3 是題目定的事件. 所以可以這樣來計算. 10/13 14:18
4F：→ nourri:謝謝 10/13 22:32
5F：→ happyntu:這個問題我覺得沒想像的直覺跟簡單，用乘法原理畫圖 11/11 16:34
6F：→ happyntu:再解無窮級數。參考下面文件43頁下面開始 11/11 16:36
7F：→ happyntu:erdos.math.louisville.edu/~pksaho01/teaching/ 11/11 16:36
8F：→ happyntu:Math662TB-09S.pdf 11/11 16:37