Let A and B be two events in a sample space for which P(A)=2/3, P(B)=1/6, and P(A ∩ B)=1/9. What is P(A ∪ B)? 2. vents for which one knows that the probability that at least one of them occurs is 3/4....

Let A and B be two events in a sample space for which P(A)=2/3, P(B)=1/6, and P(A ∩ B)=1/9. What is P(A ∪ B)?

2. vents for which one knows that the probability that at least one of them occurs is 3/4. What is the probability that neither E nor F occurs? Hint: use one of DeMorgan’s laws: Ec ∩ Fc = (E ∪ F)^c.