[math-fun] Getting a complete set

A dumb question -- I've apparently forgotten nearly all of my probability [sigh]: Given selection-with-replacement from a set of N items, what's the formula for how many picks you need to make to have a P% probability of drawing each item at least once? /Bernie\ -- Bernie Cosell Fantasy Farm Fibers mailto:bernie@fantasyfarm.com Pearisburg, VA --> Too many people, too few sheep <--