In: Statistics and Probability
A certain system can experience three different types of defects. Let Ai (i = 1,2,3) denote the event that the system has a defect of type i. Suppose that the following probabilities are true.
P(A1) = 0.15
P(A2) =
0.10 P(A3) =
0.08
P(A1 ∪ A2) = 0.17
P(A1 ∪
A3) = 0.18
P(A2 ∪ A3) = 0.15
P(A1 ∩
A2 ∩ A3) = 0.02
(a) What is the probability that the system does not have a type
1 defect?
(b) What is the probability that the system has both type 1 and
type 2 defects?
(c) What is the probability that the system has both type 1 and
type 2 defects but not a type 3 defect?
(d) What is the probability that the system has at most two of
these defects?