. Consider the system of components connected as in the accompanying picture. Components 1 and 2 are connected in parallel, so that subsystem works iff either 1 or 2 works; since 3 and 4 are connected...

. Consider the system of components connected as in the accompanying picture. Components

1 and 2 are connected in parallel, so that subsystem works iff either 1 or 2 works; since 3 and 4 are

connected in series, that subsystem works iff both 3 and 4 work. If components work independently

of one another and P(component works) ¼ .9, calculate P(system works).