Answer:
The sample model is shown below:
Step-by-step explanation:
Consider the provided information.
Your class has 18 students. Exactly 2/3 of them say that, out of all their subjects, they like science the most.
First calculate 2/3 of 18.

Hence 12 students like science the most.
We can draw a model having 18 things out of which 12 are circled.
Note: A model consist various things but remember there will be 12 things under the circle.
The sample model is shown below: