A satellite defense system works by having four satellites act independently of one another. Each satellite has a 90% chance of detecting a missile. What is the probability the system detects an incoming missile? 99.99% 99% 10% 90%
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Suppose that a satellite defense system is established in which four satellites acting independently have a 0.9 probability of detecting an incoming ballistic missile. What is the probability that at least one of the four satellites detects an incoming ballistic missile? Would you feel safe with such a system?
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