Find the indicated probability. 1) If P(A) = 0.5, P(B) = 0.4, and P(A and B) = 0.3, find P( A or B) . A) P(A or B) = 0.8 B) P(A or B) = 0.9 C) P(A or B) = 0.6 D) P(A or B) = 0.5