Refer back to the series-parallel system configuration introducedin Example 2.35, and
Chapter 2, Problem 81(choose chapter or problem)
Refer back to the series-parallel system configuration introducedin Example 2.35, and suppose that there are only twocells rather than three in each parallel subsystem [in Figure2.14(a), eliminate cells 3 and 6, and renumber cells 4 and 5 as3 and 4]. Using , the probability that system lifetimeexceeds t0 is easily seen to be .9639. To what valuewould .9 have to be changed in order to increase the systemlifetime reliability from .9639 to .99? [Hint: Let ,express system reliability in terms of p, and then let .]
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