Mitsuba Installation Path On Linux Mint Linux Mint 17.2 Rafaela 64-bit MATE 1.10.2

Blender 2.76b

I have no idea where the required Mitsuba installation path actually is?

I've tried using /usr/share/mitsuba/ but upon rendering with F12, was given a short warning saying "no module named 'numpy'" and a blank render result. As I haven't found anyone else talking about this, I'm pretty sure I am the only person in the world confused by this and I'm sorry for being stumped by what is probably an obvious solution!
Apparently the pathway for me was /usr/bin/!

But also the "no module 'numpy'" warning was part of the problem. While I had "python-numpy" installed I didn't have "python3-numpy" installed. Once I installed it, I could finally render!