SOLUTION: If P(B) = 0.4, P(A or B) = 0.7, and P(A and B) = 0.3, find P(A).

Algebra ->  Probability-and-statistics -> SOLUTION: If P(B) = 0.4, P(A or B) = 0.7, and P(A and B) = 0.3, find P(A).       Log On


   

Question 1137975: If P(B) = 0.4, P(A or B) = 0.7, and P(A and B) = 0.3, find P(A).
Answer by Boreal(15235) About Me  (Show Source):
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p(a)+p(b)-p(a and b)=p(a or b)
p(a)+0.4-0.7=0.3
p(a)=0.6