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Problem of the Week |
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PROBLEM 250 You are given a bag containing ten white marbles. You draw one out and replace it with a black marble. You then repeat the process, replacing each white marble drawn with a black marble; each time you draw out a black marble, however, you return it to the bag. What is the fewest number of drawings that would give you at least a 50% chance of having an equal number of black and white marbles?(If you don't mind losing your marbles: Same question, but suppose the bag started out with n marbles.) You are visitor
number
2322
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