I have a question about the following rule:-
Number of ways of selection of r things out of n identical things is 1. (r n).
Why is the number of ways = 1 ? Say there are 7 identical A's - A,A,A,A,A,A,A and we have to select 2 A's, then there are multiple ways of selecting 2 A's e.g we can select two A's from left corner or we can select 2 A's from the right corner or we can select 2 A's from middle......so on . In fact we can select 2 A's in any order and there will be multiple ways of selecting 2 A's. So why the rule says that there is only one way ? What am I missing ? Request advice on this.
Thanks in advance.