Random Database Pull

[eluser]codelearn[/eluser]
Hey guys,

I'm having some trouble retrieving random entries from a table. I have a certain amount of multiple choice questions in a table and I need to retrieve a random amount of questions from a random set of questions.

The structure looks like this:

Code:

id (int)
question (text)
varchar (int)
set (int)

What would be the active record code to pull lets say 3 random questions from a particular set?

Thanks so much for the help!