Which of the following is NOT true:
A. It is possible to have Pr(A)=
, Pr(B)=
and Pr(A ? B)=
.
B. If A is an event such that Pr(A)=1, then A'=?.
C. Pr(A|B)=Pr(B|A) if and only if Pr(A)=Pr(B)>0.
D. Pr(A|B)=
assuming that both Pr(A) and Pr(B) are greater than 0.
E. none of these
Answer: C
Mathematics
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