# Set Notation:

1. Feb 2, 2007

### Mesmer

I'm having a little difficulty understaning the notation used in my probability class. Would someone tell me if I'm on the right track with it :)

$$A\cup B$$ is the event "either A or B or both." Does this mean that A and B can happen together and that A or B can happen alone?

$$A\cap B is the event "both A and B" Does this mean that both events MUST happen?$$

Last edited by a moderator: Feb 2, 2007
2. Feb 2, 2007

### Mesmer

fore some reason latex is not rendering the images :(

3. Feb 2, 2007

### HallsofIvy

Staff Emeritus
Yes.

Now I'm getting a message that my reply is too short! How long does it have to be?

4. Feb 5, 2007

### Gib Z

10 characters :p

5. Feb 5, 2007