Update MorePyMC.ipynb

Probably a type since the code uses `N_B = 750`
Merge pull request #135 from hackaugusto/patch-1

Update MorePyMC.ipynb
Histogram was not visible due to incorrect ylims.
Merge pull request #136 from michaf/master

Histogram was not visible due to incorrect ylims.
non-fundamentelness of probabilities
fix a typo