An urn contains one black and nine white balls. Balls are drawn at random until the
Chapter 12, Problem 73(choose chapter or problem)
An urn contains one black and nine white balls. Balls are drawn at random until the black ball is selected. Find the probability that exactly six white balls will be drawn before the black one is if (a) each ball is replaced before the next ball is drawn and (b) balls are not replaced.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer