Suppose we want to choose 2 objects, without replacement, from the 4objects pencil, eraser, desk, and chair.
(a) How many ways can this be done, if the order of the choices is relevant?
(b) How many ways can this be done, if the order of the choices is not relevant?

Suppose we want to choose 2 objects without replacement from the 4objects pencil eraser desk and chair a How many ways can this be done if the order of the choi class=