It is known that a certain prescription drug produces undesirable side effects in 20 % of all patients

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It is known that a certain prescription drug produces undesirable side effects in 20% of all patients who use it. Among a random sample of nine patients using the drug, find the probability of each event: (show your work)

 

a) At least two have undesirable effects

 

b) Find the mean and standard deviation

 

 

I need this completed by 8:00pm (1 and 1/2 hour from now)

 

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