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An urn contains 4 white and 4 black balls. We randomly
Chapter 4, Problem 78P(choose chapter or problem)
Problem 78P
An urn contains 4 white and 4 black balls. We randomly choose 4 balls. If 2 of them are white and 2 are black, we stop. If not, we replace the balls in the urn and again randomly select 4 balls. This continues until exactly 2 of the 4 chosen are white. What is the probability that we shall make exactly n selections?
Questions & Answers
QUESTION:
Problem 78P
An urn contains 4 white and 4 black balls. We randomly choose 4 balls. If 2 of them are white and 2 are black, we stop. If not, we replace the balls in the urn and again randomly select 4 balls. This continues until exactly 2 of the 4 chosen are white. What is the probability that we shall make exactly n selections?
ANSWER:
Solution
Step 1 of 1
We have to find the probability that making exactly ‘n’ selections
Given that an urn contains 4 white and 4 black balls
And randomly chosen 4 balls in that 2 of them white and 2 of them black we stop the process