Answer:
you will need 15 liters.
Step-by-step explanation:
since you need 5 liters per every 12 guests and 36 are coming, you just need to figure out how many times 12 can go into 36, and since 12 x 3 is 36 that means you will need 3 times as many liters for 12 guests, so 5 x 3 = 15, so 15 is how many liters of soda you are going to need.
