It depends quite critically on what THIS set actually is. It would make it easier to answer a question if it is accompanied by the relevant information!
Statistic
'A' is being used as the name of some set in a problem or example. 'Set' is the term for a group of numbers with some characteristic, maybe the answer to a problem, maybe just a description (like the set of even numbers).
problem
thats your problem not mine hahah
The Set a natural number between four and 20
flow chart
58
This is a description of a microprocessor.
In database technology, domain refers to the description of an attribute's allowed values. The physical description is a set of values the attribute can have, and the semantic, or logical, description is the meaning of the attribute.
The problem in The Bad Seed is that a young girl might be committing murder.
Sterile tray set-up.
The replacement set is given in the problem and is the domain for the problem (these numbers are used to replace x). The solution set are numbers calculated from the problem and is the range (these are y values that are answers from using the equation).