SOLUTION: Please Help!!!! Find the indicated probability. If P(B) = 0.5, P(A or B) = 0.3, and P(A and B) = 0.6. P(A) =

Algebra ->  Probability-and-statistics -> SOLUTION: Please Help!!!! Find the indicated probability. If P(B) = 0.5, P(A or B) = 0.3, and P(A and B) = 0.6. P(A) =      Log On


   

Question 588432: Please Help!!!!
Find the indicated probability.

If P(B) = 0.5, P(A or B) = 0.3, and P(A and B) = 0.6.
P(A) =
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Let P(A) = x

P(A or B) = P(A) + P(B) - P(A and B)

0.3 = x + 0.5 - 0.6

0.3 = x - 0.1

0.3 + 0.1 = x

0.4 = x

x = 0.4


So P(A) = 0.4