Second alarm succeeds P(S2)=0.9 Succeeds P(S1) = 0.8 First Alarm Fails P (F1) = 0.2 Second Alarm Fails Second alarm Second Alarm Fails P (F2) = 0.1 succeeds P(S2)=0.9 P (F2) = 0.1 Question 2 Use the rule P(A and B) = P(A) x P (B) to find the probability of system failure. Let A and B be the events that the first alarm and second alarm, respectively, fail. Do you get the same answer you did in the earlier question? B I U x X Font Sizes A A