则有
E ( X ) = 2.4 , D ( X ) = 1.44
E ( X ) = 2.4 , D ( X ) = 0.96
E ( X ) = 3.6 , D ( X ) = 2.16
则有
E ( X ) = 2.4 , D ( X ) = 1.44
E ( X ) = 2.4 , D ( X ) = 0.96
E ( X ) = 3.6 , D ( X ) = 2.16
已知随机变量 X 服从 B ( n , p ) , E ( X ) = 2.4 , D ( X ) = 1.44 ,则( )A. n = 4 ， p = 0.6
【题目】设随机变量 X∼b(n,p) ,E(X)=2.4,D(X)=1.44,则n=____,p=__【题目】设随机变量 X∼b(n,p) ,E(X)=2.4,
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