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If 70% of the population has had their first COVID vaccination, what is the probability that in a random sample of 40 people, more than

If 70% of the population has had their first COVID vaccination, what is the probability that in a random sample of 40 people, more than 35% have not had their first COVID vaccination?

If scores on a particular test are normally distributed with an average score of 50 and a standard deviation of 4, what is the probability that the average score of a group of 35 randomly selected people will be less than 49?

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