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2019ҵλְ⿼Աɣ

2019-05-23 16:03:20| й

2019ҵλƸڽŵı׶ΣΪ˰λܹõıսҵλԣйΪ׼ҵλְ⿼Դ⼼ɣ࣬ϣλܼʱ鿴һ֮

һļࣿ

һŵ

ռ(Ҳе)ֳnȿΣ¼AmΣô¼AĸΪm/nΪP(A)

ڶ

¼Aһ¼BѾµķʣʱʾΪP(A|B)“BAĸ”

P(A|B)=P(AB)/ P(B)P(AB)ΪABͬʱĸʣP(B)ΪBĸʡ

һ¼AĸΪpnζظУ¼AkεĸP(k)=Cp(1-p)

ģϰ

סʶ0.6ǶĿ1Σǡ1˻еĸ()

A.0.36

B.0.48

C.0.84

D.1

ȷ𰸣B

й֪˸1Σ1˻УѡȡķC2֡ÿһѡȡÿε0.6δеĸ(1-.6)ǡ1˻еĸΪC20.6x(1-0.6)=0.48

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