# Physics 212, 2018: Lecture 21

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Back to Physics 212, 2018: Computational Modeling.

In today's lecture, we will do three things:

- introduce and study random walks following a script attached to the module.
**Your Work**: Simulate a sum of N draws from some probability distribution (binary, exponential, multinomial,...). Histogram the sum for different N. How does the histogram look like as N increases?- Introducing the projects.