Can someone explain me how i do this thing ? a tap A fills a tank in 5 hours, a
tap B fills the same tank in 10 hours.
Which of the alternatives below best represents the
time spent, if both taps are open simultaneously filling the same tank?

between 3 and 4 hours

Step-by-step explanation:

37

step-by-step explanation:

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: