Question

There are 4 different parts aligned for each housing. Align the 4 parts in the correct order. Find the probability that all 4 are aligned correctly.

Answer 1

So there are 4 slots and 4 options for the first slot, 3 for the second slot, and so on. There is a total of 24 options. Since you want a specific order, it's 1/24. (the option you want/total options)