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1 out of every 110 people have COVID-19 and do not know it. a. If there are 60 students in a class, and none of

1 out of every 110 people have COVID-19 and do not know it.

a. If there are 60 students in a class, and none of them feel sick, what is the probability that at least one has COVID-19?

b. 300 students in another course don't feel sick. Would it be unusual if none of them had COVID-19?

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