There are many questions involving the odds of getting a hand in certain conditions. If they involved the same hand they could be considered duplicates, but they do not, and the answers are similar but different.
But the topic is the same: people having troubles when calculating permutations and combinations. There are times when people plainly does not know those topics, and times when people forgot those topics despite having studied them some time ago.
The matter is that there are sites like statistics and math.SE that can address these topics, so my question is:
Is it appropriate and useful to discuss C and P here in a generic way, not specific to any poker hand but applicable as general knowledge to resolve future questions without trashing the site with questions being ultimately similar?