Dear Forum,

I have the following problem with which I cannot solve. I have a very large population of birds e.g. 10 000. There are only 8 species of birds in this population. The size of each species is the same.

I would like to calculate how many birds I have to catch, to be sure in 80% that I caught one bird of each species.

I would be very obliged for help.
Lonsdejlit