推 taichi53719:我算的答案跟你一樣，如果硬要配各分配的話二項應該是 06/08 12:56
→ taichi53719:比較適合的 06/08 12:56
想請問一題考古題
(94中正統計)
A box contain 4 red balls and 6 blue balls. Two balls are drawn at random and,
without seeing their colors, are thrown out.
If a third ball is drawn randomly and found to be a red ball,what's the
probability that the previous two balls are blue?
這題可以用條件機率去算嗎? 算出來的答案為5/12 對嗎?
那有其他的算法嗎? 譬如說服從某種分布(超幾何分布?)
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◆ From: 192.192.167.51
※ 編輯: PrettyFace 來自: 192.192.167.51 (06/07 18:05)
※ 編輯: PrettyFace 來自: 192.192.167.51 (06/07 18:07)