3.设-|||-_(i)= 0,事件A不发生,-|||-i=1,2,···, 10000,-|||-1,事件A发生,-|||-且 (A)=0.8, X1,X2,···,X10000相互独立,令 =sum _(i=1)^10000(X)_(i) 则由中心极限定理知Y近似服从的分-|||-布是 ()-|||-A.N(0,1) B.N(8000,40)-|||-C.N(1600,8000) D.N(8000,1600)