A problem such as this should contain the words "at least", "at most", or "exactly". When these words are omitted the problem is ambiguous. For instance, this particular problem: How many ways are there to pick any 5 cards from 52 cards, that ______ 2 cards are the same denomination or ______ 3 different numbers? would have 3×3=9 different answers because you could fill each blank in 3 different ways, "at least", "at most", or "exactly". Edwin