Hey everyone! I just reached Expert rank and I thought I might do a give-away to celebrate! 100 points! Prove your answer is worth 100 points! If I think that is isn't sufficiant, I'll delete it! Good luck!

i would say c is the best answer, hope it's right!

good luck! =)

cutie~

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 %  

step-by-step explanation: