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10. (10 points) An unbalanced coin has probability 0.6 to turn to head when being tossed. If the person is playing an experiment by tossing

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10. (10 points) An unbalanced coin has probability 0.6 to turn to head when being tossed. If the person is playing an experiment by tossing it up 20 times. What is the probability that there are at least 15 heads? P ( X z 15 ) = 1 - P ( X = 14 ) = 1 - 0. 8744 = 0.1256

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