The most common mixed conditional is a mix of the 3rd conditional in the if clause and the 2nd conditional in the main clause.
We use this conditional to talk about a hypothetical situation in the past (3rd conditional) with the results now (2nd conditional):
If I had studied harder, I would have a better job now.
If I hadn't gone out last night I wouldn't be tired now.
Look at the question form:
What would you do if you hadn't been given your car?
I'd take the bus to work.
Where would you live if you hadn't found a job here?
I'd live in my hometown
Another mixed conditional is a mix of the 2nd conditional in the if clause and the 3rd conditional in the main clause. We use it to say that if something were different now, something would have been different in the past:
If you were friendlier, they would have given you the job.
If they had more money, they could have bought that house.
English Grammar Reference
Zero conditional , First conditional , Second conditional , Third conditional