Beverage Dispenser D and Beverage Dispenser E have a total amount of 2076 mℓ of water. For Beverage Dispenser E and Beverage Dispenser F, the total amount of water is 3246 mℓ. The amount of water in Beverage Dispenser D is ³₈ the amount of water in Beverage Dispenser F. What is the average amount of water in the 3 beverage dispensers?
Beverage Dispenser D = 3 u
Beverage Dispenser F = 8 u 

Beverage Dispenser E + Beverage Dispenser D = 2076 --- (1)
Beverage Dispenser E + Beverage Dispenser F = 3246 --- (2)

(2) - (1)
(Beverage Dispenser E + Beverage Dispenser D) - (Beverage Dispenser E + Beverage Dispenser F) = 3246 - 2076
8 u - 3 u = 1170
5 u = 1170

1 u = 1170 ÷ 5 = 234
Beverage Dispenser D = 3 u = 234 x 3 = 702

Beverage Dispenser D + Beverage Dispenser E + Beverage Dispenser F = 702 + 3246 = 3948 mℓ

Average amount of water in the 3 beverage dispensers
= 3948 ÷ 3 
= 1316 mℓ

Answer(s): 1316 mℓ