Given P ( AB ) = 1
3 , P ( A + B ) = 2
3 , find P ( B ). What is
P ( A ), if P ( AB ) = 1
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hii dear
ur answer
As most of the answers have pointed out, P (A and B) is necessarily 0 if A and B are mutually exclusive. Because the definition of “mutually exclusive” actually MEANS that the probability of P(A and B) is 0!!
However, I suspect the questioner really meant: What is the probability of A OR B if A and B are mutually exclusive?
If the events are mutually exclusive, then the probably of A OR B is:
P(A) + P(B) = 1/3 + 1/6 = 2/6 + 1/6 = 3/6 = 1/2.
ur answer
As most of the answers have pointed out, P (A and B) is necessarily 0 if A and B are mutually exclusive. Because the definition of “mutually exclusive” actually MEANS that the probability of P(A and B) is 0!!
However, I suspect the questioner really meant: What is the probability of A OR B if A and B are mutually exclusive?
If the events are mutually exclusive, then the probably of A OR B is:
P(A) + P(B) = 1/3 + 1/6 = 2/6 + 1/6 = 3/6 = 1/2.
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