1) impossible event; An event with a probability of 0 occurs.

2) Random event: an event that may or may not occur, with a probability greater than 0 and less than 1.

3) Inevitable event: an event with a probability of 1.

The events learned in junior high school are such possible events.

I want to know what the possible events you mentioned are.

If you are satisfied, please adopt it in time. If you have any questions, please ask.