Question: Using Braun battery-powered alarm clocks, the author estimates that the probability of failure on any given day is 1/1000. (a) What is the probability that

Using Braun battery-powered alarm clocks, the author estimates that the probability of failure on any given day is 1/1000.

(a) What is the probability that the alarm clock works for an important event?

(b) When he uses two alarm clocks for important events, what is the probability that at least one of them works?

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