Picking one of two numbers.

I’m still kind of a noob at this so forgive me if the answer seems a bit obvious, but if I have two or more numbers in a series (Ex: 180,90,270) how would I randomly pick one of those exact numbers without getting complicated?

That exact series?

Random.Range(1, 4) * 90

Some arbitrary series:

var numbers = [1, 5, 10, 20];
var pick = numbers[Random.Range(0, numbers.Length)];