Hi tutor

The poster in KFC says you can make a happy meal by choosing a main, a side and a drink. These are the choices:

Main: Hambuger, Cheeseburger, Chicken Nuggest, Crispy Snack Wrap, Seard Snack Wrap

Side: Fires, Apple pieces

Drink: Soft drink, Thickshake, Juice, Water

If she has a Happy meal every week, is it possible to cover all the possible Happy Meals exactly once so that every week she has a diffrent choice for all three parts than she did last week?

The stupid way to solve it is to list all situations like this:

A1 B1 C1

A2 B2 C2

A1 B1 C3

A2 B2 C1

A1 B1 C2

A2 B2 C3

A1 B1 C4

A2 B2 C2

A1 B3 C1

...which is a long process, can you have a better way to solve it?

i think this puzzle belongs to statistics or possibility .