SOLUTION: For two events, A and B, P(A) =.4, P(B) =.7, and P(A?B) = .2. What is P(A|B)? I know the answer but need to know HOW to get the answer I've tried P (A|B)= p(A)x P(B)= .28, howe

Algebra ->  Probability-and-statistics -> SOLUTION: For two events, A and B, P(A) =.4, P(B) =.7, and P(A?B) = .2. What is P(A|B)? I know the answer but need to know HOW to get the answer I've tried P (A|B)= p(A)x P(B)= .28, howe      Log On


   

Question 939569: For two events, A and B, P(A) =.4, P(B) =.7, and P(A?B) = .2. What is P(A|B)?
I know the answer but need to know HOW to get the answer
I've tried P (A|B)= p(A)x P(B)= .28, however the choices are .29 (correct answer), .5, .08, .14. Somehow I think I'm missing something as neither the mutually exclusive nor the addictive rule seem to fit.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
For two events, A and B, P(A) =.4, P(B) =.7, and P(A?B) = .2. What is P(A|B)?
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Comment:: Since P(A|B) is not 0.4*0.7, A and B are NOT independent events.
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Formula you need:: P(A|B) = P(A and B)/P(B)
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Question:: What do you mean by P(A?B) = 0.2
Cheers,
Stan H.
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