# If variance is 0, then p(x=c) = 1 c is constant

1. Dec 15, 2005

### flying2000

I think it is easy but I can't figure it out. :(
any help?

2. Dec 16, 2005

### EnumaElish

Are you trying to prove or disprove the thread title?

Is this homework?

3. Dec 16, 2005

### matt grime

You may suppose that the expectation is zero, you know, that makes it (even) easier.

4. Dec 16, 2005

### Hurkyl

Staff Emeritus
I would advise figuring out what you're trying to prove before working on the proof. (The sentence in the title is not a well-posed question!)