Probability question


New Member
Hi guys,
I have a probability question that I really tryed to solved, but seems to be to hard for my actual knowledge. I would kindly asked if you can help me with that.

We have 985 white balls and 15 black balls, randomly distributed in the white balls.
All 1000 balls are splited in grups of 10 balls, so we have 100 groups, each group having 10 balls.
The questions is: which is the probability to have more than 1 black ball in any group of 10 balls?
Many thanks in advance for your kind support! :)