• 2021-04-14
    设随机变量X取值为1,2,3,4,P(X=i)=c(5-i),i=1,2,3,4,则常数c的值为
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      以下程序的输出结果是() main( ) { int i , x[3][3]={9 , 8 , 7 , 6 , 5 , 4 , 3 , 2 , 1} , *p=&x[1][1] ; for(i=0 ; i<4 ; i+=2) printf("%d " , p[i]) ;

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      2、设随机变量X服从Poisson分布,且P(X=1)=P(X=2) (1)、E(X)的值为? A: 3 B: 5 C: 2 D: 4

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      设随机变量X~U(0,3),则P{1≤X<2}=()。 A: 1/3 B: 2/3 C: 1/4 D: 3/4

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      某事故树的最小割集为:{x1},{x2,x3},{x2,x4,x5},则结构重要程度为()。 A: I(4)>;I(2)>;I(3)>;I(1)=I(5) B: I(1)>;I(2)>;I(3)>;I(4)=I(5) C: I(1)>;I(5)>;I(3)>;I(4)=I(2) D: I(5)>;I(3)>;I(2)>;I(1)=I(4)

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      Public Sub Proc(a%( )) Static i% Do a(i) = a(i) + a(i + 1) i = i + 1 Loop While i < 2 End Sub Private Sub Command1_Click( ) Dim m%, i%, x%(10) For i = 0 To 4: x(i) = i + 1:  Next i For i = 1 To 2: Call Proc(x):    Next i For i = 0 To 4: Print x(i);:    Next i End Sub A: 3 4 7 5 6 B: 3 5 7 4 5 C: 2 3 4 4 5 D: 4 5 6 7 8