I hope someone can help! I can’t solve this at all ?
• There is a bag with 10 marbles in it
• 8 are black
• 2 are white
• You pick a marble
• If it is black you pick again
• Once you pick a white marble you stop picking
• What is the probability that after a maximum of 4 picks you will have chosen a white marble?
I can get my head to working out the probability of choosing a white marble each round, but not to what the overall probability that a white will be chosen over 4 rounds! Although, I may well be wrong so don’t assume I’ve understood that bit correctly ?
It would be great if someone could explain to me how to solve this as well as what the correct answer is! I want to understand, not just be given the answer
Thank you for any help!
• There is a bag with 10 marbles in it
• 8 are black
• 2 are white
• You pick a marble
• If it is black you pick again
• Once you pick a white marble you stop picking
• What is the probability that after a maximum of 4 picks you will have chosen a white marble?
I can get my head to working out the probability of choosing a white marble each round, but not to what the overall probability that a white will be chosen over 4 rounds! Although, I may well be wrong so don’t assume I’ve understood that bit correctly ?
It would be great if someone could explain to me how to solve this as well as what the correct answer is! I want to understand, not just be given the answer
Thank you for any help!