SOLUTION: If P(A or B) = 0.8, P(A) = 0.8 and P(B) = 0.5, determine P(A and B). (Points : 3) 0.35 0.50 0.64 0.13

Algebra ->  Probability-and-statistics -> SOLUTION: If P(A or B) = 0.8, P(A) = 0.8 and P(B) = 0.5, determine P(A and B). (Points : 3) 0.35 0.50 0.64 0.13       Log On


   

Question 408046: If P(A or B) = 0.8, P(A) = 0.8 and P(B) = 0.5, determine P(A and B).
(Points : 3)
0.35
0.50
0.64
0.13
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
P(A and B) = P(A) + P(B) - P(A U B) = 0.8 + 0.5 - .8 = 0.5