The scores on a placement test given to college freshmen for the past five years are approximately normally distributed with a mean µ = 74 and a variance σ 2 = 8. would you still consider σ 2= 8 to be a valid value of the variance if a random sample of 20 students who take the placement test this year obtain a value of s 2 = 20?

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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answer: howdy

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it's d

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2,160 π

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