Question

there are 5 desser courses in a restuarant. they will be presented two at a time in an order how many different arrangements are there

Answer 1

There are 15 different arrangement you could have with 2 at a time. These are all:

1;1  1;2  1;3  1;4  1;5  2;2  2;3  2;4  2;5  3;3  3;4  3;5  4;4  4;5  5;5

May I have brainliest please? :)