- #1
Nick666
- 168
- 7
My knowledge about this kind of problems is almost zero, so I need some help.
I know that if we have 20 balls in a urn, 1 to 20, the probability to extract 1 to 5 in a extraction is 5/20=1/4
But what if we have 4 extractions with the balls extracted put back in the urn? How do I calculate that ?
I know that if we have 20 balls in a urn, 1 to 20, the probability to extract 1 to 5 in a extraction is 5/20=1/4
But what if we have 4 extractions with the balls extracted put back in the urn? How do I calculate that ?