Question

How many different samples of size n can be chosen from a finite population of size a) N=7 b) N=24?

Answer 1

sorry, size n=2

Answer 2

\[\dbinom{7}{2}=\frac{7\times 6}{2}=21\]\]

Answer 3

similarly
\[\dbinom{24}{2}=\frac{24\times 23}{2}\]

Answer 4

awesome, thanks