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Suppose that 80% of adults with allergies report symptomatic relief with a specific medication. If the...

Suppose that 80% of adults with allergies report symptomatic relief with a specific medication. If the medication is given to 10 new patients with allergies,

a)                     On average, how many people of 10 do we expect it to be effective?

                                   

b)                     What is the probability that it is effective in exactly nine?

c)                     What is the probability that it is effective in at least nine?

d)                     Suppose we give the medication to 100 people with allergies, what is the probability that the medication is effective on at least 90% of the subjects?

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