Question

Suppose we want to choose 2 letters, without replacement from the 5 etters A, B, C, D, and E.(a) How many ways can this be done, if the order of the choices matters?(6) How many ways can this be done if the order of the choices does not matter

Answer 1

Explanation

This is a permutation and combination question. These are questions that involve making a set of choices out of a number of given alternatives. Or just picking a number of stuff from a bigger n

Note that permutation is used when the order of choices is important