edited index "ToC"

Author: JoramSoch

I/ToC.md

@@ -121,8 +121,9 @@ title: "Table of Contents"
    &emsp;&ensp; 1.10.10. **[Squared expectation of a product](/P/mean-prodsqr)** <br>
    &emsp;&ensp; 1.10.11. **[Law of total expectation](/P/mean-tot)** <br>
    &emsp;&ensp; 1.10.12. **[Law of the unconscious statistician](/P/mean-lotus)** <br>
-   &emsp;&ensp; 1.10.13. *[Expected value of a random vector](/D/mean-rvec)* <br>
-   &emsp;&ensp; 1.10.14. *[Expected value of a random matrix](/D/mean-rmat)* <br>
+   &emsp;&ensp; 1.10.13. **[Weak law of large numbers](/P/mean-wlln)** <br>
+   &emsp;&ensp; 1.10.14. *[Expected value of a random vector](/D/mean-rvec)* <br>
+   &emsp;&ensp; 1.10.15. *[Expected value of a random matrix](/D/mean-rmat)* <br>
 
    1.11. Variance <br>
    &emsp;&ensp; 1.11.1. *[Definition](/D/var)* <br>