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Consider the system of components connected as in the accompanying picture. Components 1 and 2 are...

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 if both 3 and 4 work. If components work independently of one another and P(component i works) 5 .9 for i 5 1,2 and 5 .8 for i 5 3,4, calculate P(system does not work).

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