A system contains two subsystems connected in series, such that the system can function properly only if both of the two subsystems can function properly. Let the probability is 0.85 for each subsystem to function properly and assume the subsystems function independently. What is the probability that the whole system can function properly

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.