tech?

Honestly, it depends on what house. I think majors are pretty spread out as far as fraternities go, but if you're asking for sororities, it really depends. ADPi? All business majors. They have like 1 engineer. AXO, a lot more engineers. And then some of the other houses have more engineers than others.

Nobody will discriminate against your major. unless you walk up to a place like phi delt, which is a place known for not being the smartest and partying hard all the time, and are an aerospace or electrical engineer or a crazy hard major, then you might face some trouble. but nobody really honestly cares just be yourself and you will end up where you want to be

When I was an undergrad, we had 12 AE's and 5 ChemE's - widely considered the two hardest majors.
Our neighbors only had 1 AE and definitely had lots of BusAdm majors (not sure count).
Varies by house.

There's definitely a higher ratio of business/liberal arts majors to engineers in sororities than just on campus in general. But some of the smartest people I know are in greek life, so it doesn't really mean anything.