Beverage Dispenser J and Beverage Dispenser K have a total amount of 2071 mℓ of water. For Beverage Dispenser K and Beverage Dispenser L, the total amount of water is 3289 mℓ. The amount of water in Beverage Dispenser J is ²₅ the amount of water in Beverage Dispenser L. What is the average amount of water in the 3 beverage dispensers?
Beverage Dispenser J = 2 u
Beverage Dispenser L = 5 u 

Beverage Dispenser K + Beverage Dispenser J = 2071 --- (1)
Beverage Dispenser K + Beverage Dispenser L = 3289 --- (2)

(2) - (1)
(Beverage Dispenser K + Beverage Dispenser J) - (Beverage Dispenser K + Beverage Dispenser L) = 3289 - 2071
5 u - 2 u = 1218
3 u = 1218

1 u = 1218 ÷ 3 = 406
Beverage Dispenser J = 2 u = 406 x 2 = 812

Beverage Dispenser J + Beverage Dispenser K + Beverage Dispenser L = 812 + 3289 = 4101 mℓ

Average amount of water in the 3 beverage dispensers
= 4101 ÷ 3 
= 1367 mℓ

Answer(s): 1367 mℓ