[問題] 94北科統計

看板Grad-ProbAsk作者 (江小LO)時間15年前 (2009/03/25 17:00), 編輯推噓0(000)
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a factory produces 10 glass comtainers daily.itmay be assumed that there is a constant probability p=0.1 of producing a defective container.before these containers are stored they are inspected and defective ones are set aside. suppose that there is a constant probalility r=0.1 that a defective container is misclassified.let X equal the number of containers classified as defective at the end of a production day.(suppose that all containers which are manufactured on a particular day are also inspected on that day.) compute P(X=2)? a. 0.1937 b. 0.1714 c. 0.2541 d. none of above 我的算法 1. 10C2*0.1^2*0.9^8=0.1937 2. 10C2*0.01^2*0.99^8=0.00415 請問哪個P是正確的 0.1 & 0.01 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 218.168.3.194
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