2×1=10

Sadly, running jupyter notebook from within a conda environment does not imply your notebook also runs in the same environment. Thankfully, there’s an easy fix for that, namely nb_conda, and you’ll get it using

conda install nb_conda

in the environment of your choice. After that, start up your notebook and select the Kernel you want either when creating a new notebook or from the notebook’s Kernel menu:

There we go.