Ba thi sinh Cau, Binh, An, docj lap tham gia cuoc thi giong hat hay. Gia su kha nang vao vong 2 cua ba thi sinh lan luot la 0.6, 0.8, 0.7. Tinh xac suat: Ca 3 deu vao duoc vong 2; co nhieu nhat 2 thi sinh vao duoc vong 2.

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:

explanation:

step-by-step explanation:

if i knew id you bro,, my bad

7 9/10 as an improper fractions is 79/10.

hope it : )