作者heyhey1025 (heyhey)
站内Grad-ProbAsk
标题[问题] 统计问题
时间Fri Mar 27 17:14:51 2009
１.一副完整的扑克牌，随机抽出１３张，是计算
同时拥有任一同花色的Ａ和Ｋ的机率？A=0.2198
２.Suppose that A,B,and C are three independent events such that P(A)=0.5,
P(B), and P(C)=0.2 . What is the probability that exactly one of these
three events will occur? A=0.46
机率问题 请帮我ㄧ下 跪求 拜托
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1F：推 Bolvalf:第二题用0.5*0.8*0.8+0.5*0.2*0.8*2-0.5*0.2*0.2=0.46 03/27 18:03
2F：→ Bolvalf:[A发生B,C不发生+B发生A,C不发生+C发生A,B不发生]-都发生 03/27 18:04
3F：→ heyhey1025:谢谢~~第一题 想了很久 拜托 给我一点提示 03/27 18:14