8. A certain electronic system contains 10 components. Suppose that the probability that each individual component will fail is 0.2 and that the components fail inde-
pendently of each other. Given that at least one of the components has failed, what is the probability that at least two of the components have failed?
Não tenho o gabarito.
Pensei que a intersecção do evento ocorrer pelo menos 1 falha com pelo menos 2 falhas seria o próprio evento "ocorrer pelo menos duas falhas).
Bastaria, ...
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