help !

Is this a standard deck of 52 cards where the ranks 2 - 6 have been removed? Or any 5 ranks so long as no kings or aces were removed?

edit: I suppose the bottom line is, which 20 cards have been removed?

This is exactly the same question as http://www.freemathhelp.com/forum/threads/80871-probability
which mathe25 posted 15 minutes earlier. mathe25 has also edited both posts to make the deck a standard 52 card deck without mentioning it.