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29 March, 01:59

George flips a colored chip that is red on one side and black on the other a total of 20 times. What is the probability of the 21th flip resulting in landing on the black side up?

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  1. 29 March, 04:45
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    1/2. Any time he flips the chip, is has a 50% chance of going either way, no matter what happened before.
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