Haven't done probabilities like this in a while, and i can't seem to find a convincing answer.
Basically, i'd like to know what is the probability of having randomly picked (at least once) 800 objects out of a 1000 object list after N attempts.
- The objects are all different.
- Once picked, the objects go back in the list (all picks are independent)
I have found this formula, but it doesnt seem to work in excel : First formula on this page
I would appreciate any help and excel implementaiton !
Thanks !
PS: sorry i do not know the exact concept words in english for this problem 1
=SUM(range)
. $\endgroup$