Variations without repetition

Find out how many different ways you can choose k items from n items set. With/without repetition, with/without order.

(n)
(k)

Calculation:

V_k(n) = fraction{n!}{(n - k)!} ; ; V_{ 3} (11) = fraction{ 11!}{( 11 - 3)!} = fraction{ 11!}{ 8!} = 11 * 10 * 9 = 990 ; ;

Number of variations: 990