Julie Young is an experienced financial writer and editor. She specializes in financial analysis in capital planning and investment management. Eric's career includes extensive work in both public and ...

A discrete random variable is a type of random variable that can take on a countable set of distinct values. Common examples include the number of children in a family, the outcome of rolling a die, ...

"n-1 choices for the 2nd element \n", "n-k+1 choices for the kth element \n", "this gives $n * (n-1) * (n-k+1) = \\frac{n!}{(n-k)!}$ which is number of k-combinations ...