What Does ##n(A)## Represent in Set Theory?

[adjacent]

Homework Statement

$n(A)$
I have some doubts.
Obviously, $n(A)$ means the number of elements in set A.
Should it be 3 or 6?

Should I consider each number to be a different element?

 

[micromass]

The names of the elements are irrelevant. If you change the names $\{1,2,3\}$ by $\{a,b,c\}$, then it will have the same number of elements. Does that answer your question?

 

[adjacent]

The names of the elements are irrelevant. If you change the names $\{1,2,3\}$ by $\{a,b,c\}$, then it will have the same number of elements. Does that answer your question?

Yes, thank you