A、当n充分大时，近似有x～ n p,p(1-p)/n〔
B、p{x=k}=c^k n P^k(1-p)^n-k,k=0,1,2,...,n
C、p{x=k/n}=C^k n P^k(1-p)^n-k,k=0,1,2...,n
D、p{xi=k}=c^k n P^k(1-p)^n-k,1≤i≤n
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A、当n充分大时，近似有x～ n p,p(1-p)/n〔
B、p{x=k}=c^k n P^k(1-p)^n-k,k=0,1,2,...,n
C、p{x=k/n}=C^k n P^k(1-p)^n-k,k=0,1,2...,n
D、p{xi=k}=c^k n P^k(1-p)^n-k,1≤i≤n
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