They are not the same but very close, the reasoning for this is that theoretical things are not 100% accurate therefore meaning that the answers with a real experiment may vary.
N=10-7
n=3
Now
2n-2
2*3-2
6-2
4

You probably already know that the range of

is all non-negative real numbers, right?
The next number is 11, counting by 2’s
That’s really nice man. I’m sure she’ll love it