Question 1049033
a. P(A) + P(B)  - P(A and B) = P(A) + P(B) - P(B|A)*P(A) = 0.6 + 0.3 - 0.4*0.6 = 0.66.


b. 0.66 - 0.24 = 0.42


c. 1 - P(A or B) = 1 - 0.66 = 0.34.