A research laboratory in the psychology of dreams has 4 rooms with two beds in each. Three

pairs of identical twins are studied. Each pair is to be placed in a room and each twin assigned a bed.

In how many different ways can the experiment be set up?

Verständnis:
Es gibt 

4 rooms = R1, R2, R3, R4   
3 pairs = A1A2, B1B2, C1C2 (Zwillinge)
2 beds = Anordnung entweder kann ein Zwilling A1A2 oder A2A1 -> 2! = 2

4 rooms * 3 pairs * 2 sleeping order  = 24 ways

Stimmt meine Überlegung?

Vielen Dank!

Sayuri