概率的一道Two cards are drawn without replacement from an ordinar
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概率的一道
Two cards are drawn without replacement from an ordinary deck,find the probability that the second is diamond,given that the first is a diamond.
排列组合的一道
How many 4 card hands are possible with a 26-card deck?
Two cards are drawn without replacement from an ordinary deck,find the probability that the second is diamond,given that the first is a diamond.
排列组合的一道
How many 4 card hands are possible with a 26-card deck?
翻译吗?
从一副普通的扑克牌中 不放回的抽取两张牌,一直第一张是方块,求第二张是方块的概率.
26张牌的一副扑克中 4张牌的可能组合有多少种?
从一副普通的扑克牌中 不放回的抽取两张牌,一直第一张是方块,求第二张是方块的概率.
26张牌的一副扑克中 4张牌的可能组合有多少种?
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