Can you describe a counting problem where the size of set is equal to: $$ k!{{n-1}\choose{k-1}} $$
Find a set whose size is $k!{{n-1}\choose{k-1}}$.
-1
$\begingroup$
combinatorics
binomial-coefficients
factorial
1 Answers
3
Alice is in a class of $n$ people. In how many ways may $k$ of the people from the class be lined up for a picture if Alice must be included in the people selected?