Introduction to Combinatorics

In class today I gave an overview of how to use the itertools library to solve combinatorics type problems.

You can see a recording of the class here

Here is the notebook I used in class: combinatorics.ipynb

To solve the following problem:

The digits 1, 2, 3 and 4 are arranged in random order, to form a four-digit number.

1. How many different four-digit numbers can be formed?
2. How many different four-digit numbers:
   1. Are even.
   2. Are less than 4000.

We did not quite have time to get to the last part, if you do attempt the question and would like some feedback let me know.

If you have any questions please let me know.