How do four people draw lots?

① ② ③ ④ A * * has a drawing method of 4x3x2x 1

The first one has four possibilities, the second one has three possibilities, the third one has two possibilities and the fourth one has 1 possibility.

Since everyone can draw the original position once, it is 4x3x2x 1-4=20 kinds 1-20/25= 1/5.