Hi,
I have a problem in random sampling:
Suppose there exist N distinct objects, each time get n objects out
of
them(these n objects must be different) and then put them back, keep
sampling for k rounds, and at last, what is the probability of at least x
distinct objects have been selected at least once?
I tried to get a general formula for it, but failed. Can anybody tell
me how to do and which book covers this similar contents? Thanks a lot!!
ronghua
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