Question

Yoda Soda is the intergalactic party drink that will have all your friends saying, "Mmmmmm, good this is!"

Answer 1

You need 15 liters of Yoda Soda

Answer 2

I believe the answer is 15 liters because for every 12 guests you need 5 liters, and since you have 3 times more guests than 12, you do 3*5 and that gives you 15 liters.