To create an easy probability model for class attendance, just follow these simple steps:

1. Collect Attendance Data
   Keep track of who comes to class for one month.
   Write down how many students are there and how many are missing each day.

2. Calculate Probabilities
   Let's say 20 out of 25 students come to class.
   The chance of a student attending class can be calculated like this:

   • ( P(\text{Attend}) = \frac{20}{25} = 0.8 )
     This means there is an 80% chance a student will show up.

3. Show Possible Outcomes
   Use your probability model to show how likely different attendance options are. For example:

   • Present: 80%
   • Absent: 20%

This model can help you understand and guess how many students might come to class in the future.