Cylinder M and Cylinder N have a total amount of 1914 mℓ of water. For Cylinder N and Cylinder P, the total amount of water is 3666 mℓ. The amount of water in Cylinder M is ³₅ the amount of water in Cylinder P. What is the average amount of water in the 3 cylinders?
Cylinder M = 3 u
Cylinder P = 5 u 

Cylinder N + Cylinder M = 1914 --- (1)
Cylinder N + Cylinder P = 3666 --- (2)

(2) - (1)
(Cylinder N + Cylinder M) - (Cylinder N + Cylinder P) = 3666 - 1914
5 u - 3 u = 1752
2 u = 1752

1 u = 1752 ÷ 2 = 876
Cylinder M = 3 u = 876 x 3 = 2628

Cylinder M + Cylinder N + Cylinder P = 2628 + 3666 = 6294 mℓ

Average amount of water in the 3 cylinders
= 6294 ÷ 3 
= 2098 mℓ

Answer(s): 2098 mℓ