If P(A) = 6/17, P(B) = 5/17, and P(A ∪ B) = 4/17 Find P(B|A)? Choices.
A) 2 / 3  B) 3 / 5  C) 2 / 7  D) 3 / 7  E) 4 / 9

Rationale: "p ( b | a ) = p ( a ∪ b ) / p ( a ) p ( b | a ) = ( 4 / 17 ) / ( 6 / 17 ) = 4 / 6 = 2 / 3 . a"
Answer: A