Question 850043: Please help, question is; Suppose we select without looking, one marble from a bag containing 6 red marbles and 8 blue marbles.
a)what is the probability of selecting a blue marble on the first try?
b) if you return the marble to the bag, what is the probability of selecting a red marble?
c) if you first selected a red marble and you don't return that marble to the bag, what is the probability of the second draw being a blue marble?
d) Starting over with all the marbles in the bag, how many draws would you need to guarantee blue marble?
Found 2 solutions by stanbon, richwmiller:
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Please help, question is; Suppose we select without looking, one marble from a bag containing 6 red marbles and 8 blue marbles.
a)what is the probability of selecting a blue marble on the first try?:: 8/14
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b) if you return the marble to the bag, what is the probability of selecting a red marble?:: 6/14
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c) if you first selected a red marble and you don't return that marble to the bag, what is the probability of the second draw being a blue marble?::8/13
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d) Starting over with all the marbles in the bag, how many draws would you need to guarantee getting a blue marble?:: 7
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Cheers,
Stan H.
Answer by richwmiller(17219)  (Show Source):
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