The world health organization estimate that 5% of all adults in sub-Saharan Africa are living with HIV. a survey takes a random sample of 1600 adults from all over sub-Saharan Africa and find that 84 have HIV . The sampling distribution of the proportion who live with HIV is approximately

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yes

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amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

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what "following statement"?

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