Answer:
6
Explanation:
The ratio of omelets and egg is calculated as:
omelets: egg = 3:9
omelets: egg = 1:3
The number of the omelets made by 18 eggs will be calculated as below:
omelets: egg = 1:3
omelets: 18 = 1:3
omelets = 18 x (1/3)
omelets = 6
Therefore, the number of omelets made by 18 eggs will be 6.