Beverage Dispenser N and Beverage Dispenser P have a total amount of 937 mℓ of water. For Beverage Dispenser P and Beverage Dispenser Q, the total amount of water is 4317 mℓ. The amount of water in Beverage Dispenser N is ³₇ the amount of water in Beverage Dispenser Q. What is the average amount of water in the 3 beverage dispensers?
Beverage Dispenser N = 3 u
Beverage Dispenser Q = 7 u 

Beverage Dispenser P + Beverage Dispenser N = 937 --- (1)
Beverage Dispenser P + Beverage Dispenser Q = 4317 --- (2)

(2) - (1)
(Beverage Dispenser P + Beverage Dispenser N) - (Beverage Dispenser P + Beverage Dispenser Q) = 4317 - 937
7 u - 3 u = 3380
4 u = 3380

1 u = 3380 ÷ 4 = 845
Beverage Dispenser N = 3 u = 845 x 3 = 2535

Beverage Dispenser N + Beverage Dispenser P + Beverage Dispenser Q = 2535 + 4317 = 6852 mℓ

Average amount of water in the 3 beverage dispensers
= 6852 ÷ 3 
= 2284 mℓ

Answer(s): 2284 mℓ