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【简答题】

已知P(A)=P(B)=P(C)=1/4, P(AB)=0,P(AC)=P(BC)=1/6,则事件A,B,C全不发生的概率为______.

题目标签:事件概率
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参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】有如下事件过程:Private Sub Form_Load() Show Dim Arr() As Variant Arr = Array(1, 3, 5, 7, 9, 11, 13, 15) Call converse(Arr) For i = 0 To 7 Print arr(i); Next iEnd Sub 以上程序的功能是,通过调用Converse过程,将数组Arr中的元素逆序存放并输出...

A.
Private Sub converse(dim a() as Variant ) Dim T For i = LBound(A) To UBound(A) T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
B.
Private Sub converse(dim a() as Variant) Dim T Dim J As Integer J = (LBound(A) + UBound(A)) / 2 For i = LBound(A) To J T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
C.
Private Sub converse(a() As Variant) Dim T For i = LBound(A) To UBound(A) T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
D.
Private Sub converse(a() As Variant) Dim T Dim J As Integer J = Int((LBound(A) + UBound(A)) / 2) For i = LBound(A) To J T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub

【多选题】在相同的条件下重复一个行为或试验,不确定性事件所出现的结果的特点是( )。

A.
所出现的结果有多种
B.
出现的结果只有一种
C.
具体是哪种结果事前不可预知
D.
出现的结果能事前预知
E.
出现的结果是确定的

【单选题】从中任取两球都是黑球的概率为()。 A.5/33 B.7/22 C.5/12 D.7/12

A.
在一个盒子里装有均匀的已编有不同号码的五个白球和七个黑球,则: