推 Nocp:A card hand selected from a standard card deck 前面少打 02/02 15:06
推 Nocp:所以意思是 這人有5張牌 還要再抽3張?! 02/02 15:08
※ 引述《Nocp (衝浪..被浪沖 傻傻分不清)》之銘言：
: A card hand selected from a deck consists of 2 kings ,2 queens and a jack.
: Three additional cards are selected at random and without replacement
: from the remaining cards in the deck .
不是吧@@"
應該是 三張牌從剩下的47張牌抽出
: What is the probability that the enlarged hand contains at least three
: kings?
所以 現在手上的八張牌 有至少三張king 的機率~
吧??
: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
: 由題目知 每抽到一張牌 丟 3張同樣回去, 可是不重複所以要扣一張走 = 丟兩張回去
: 請問 可以這樣分析?!
: 1 - P (每次都沒抽到 K )
: 3 5 7
: = 1 - ( --- + --- +--- ............)
: 5 7 9
: 那接下來該怎辦...!?
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