Probability.

README.md

@@ -737,8 +737,8 @@ You'll get more graph practice in Skiena's book (see Books section below) and th
         - [x] Local pairwise sequence alignment: https://www.coursera.org/learn/algorithmic-thinking-2/lecture/WnNau/local-pairwise-sequence-alignment
 
 - [ ] **Combinatorics (n choose k) & Probability**
-    - [ ] Make School: Probability: https://www.youtube.com/watch?v=sZkAAk9Wwa4
-    - [ ] Make School: More Probability and Markov Chains: https://www.youtube.com/watch?v=dNaJg-mLobQ
+    - [x] Make School: Probability: https://www.youtube.com/watch?v=sZkAAk9Wwa4
+    - [x] Make School: More Probability and Markov Chains: https://www.youtube.com/watch?v=dNaJg-mLobQ
     - [x] Math Skills: How to find Factorial, Permutation and Combination (Choose): https://www.youtube.com/watch?v=8RRo6Ti9d0U
     - [ ] MIT 6.042J - Probability Introduction: https://www.youtube.com/watch?v=SmFwFdESMHI&index=18&list=PLB7540DEDD482705B
     - [ ] MIT 6.042J - Conditional Probability: https://www.youtube.com/watch?v=E6FbvM-FGZ8&index=19&list=PLB7540DEDD482705B