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 %
2 1/2 cups plus 2 1/2...