Randomize Question Bank Order

Hi everyone,

I am working on a project for a client who wants to have complete randomization of quiz questions.  

There will be 15 question banks, with 3 questions each.  I am cool with randomizing the questions within the banks.

What I need help with is randomizing the order of the question banks.  

I tried using Lance G.'s random number generator:


which got me to randomly selecting the first question bank.  But after that it got messy for me.  

I can replicate and continue to randomize, but the problem I have is repeating a question bank (which we don't want to do).  Stumped on how I can set it to not repeat a question bank.

Any help is appreciated.


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