Question

2n!/n! = ?


This is from the chapter permutation and combination

Answer 1

Answer:

No,

Permutation means:

permutation relates to the act of arranging all the members of a set into some sequence or order

n!/(n-r)!

Combination Means:

combination is a way of selecting items from a collection, such that (unlike permutations) the order of selection does not matte

n!/(r!*(n-r)!)