The problem involves a simple probability calculation that can be handled efficiently by straightforward mathematical rules and computations. Using machine learning techniques would introduce unnecessary complexity and operational overhead.

Option C (Correct): " Use code that will calculate probability by using simple rules and computations " : This is the correct answer because it directly solves the problem with minimal overhead, using basic probability rules.

Option A: " Use supervised learning to create a regression model " is incorrect as it overcomplicates the solution for a simple probability problem.

Option B: " Use reinforcement learning to train a model " is incorrect because reinforcement learning is not needed for a simple probability calculation.

Option D: " Use unsupervised learning to create a model " is incorrect as unsupervised learning is not applicable to this task.

AWS AI Practitioner References:

Choosing the Right Solution for AI Tasks: AWS recommends using the simplest and most efficient approach to solve a given problem, avoiding unnecessary machine learning techniques for straightforward tasks.