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Please be patient with my English, as I am a native Korean and English is not my first language.

I want to write a story about a political organization built on fortune-telling.

Let us assume there are fortune-tellers who accurately predict the future more than 50% of the time, without any prior or inside information.

And, at this time, 'the probability' is not the probability of the fortuneteller's 'right foretell' but the probability that fortune-tellers present 'a right foretell'. [Edit: this sentence left as written.]

Here is my question.

If there is two fortune-tellers who have 60% chance of accurately answering a question about the future, is there a way to employ such fortune-tellers to increase the odds above 60%.

Would increasing the number of fortune-tellers to ten or more raise the odds of always making "right decisions?"

If possible, to optimize probability of accuracy, how should fortune-tellers foretell? [Edit: open-endedness of original preserved.]

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    please... Now I'm in the envoronment that cannot use my language... english is terribly difficult. though this, i had to write this question to solve my terrible this question.. please give me a answer... T.T2012-07-20
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    So, the question is: given that any fortune-teller's probability in predicting the outcome of an event (of binary type) is about 60%, how many fortune-tellers should a political organization hire to make the right choices? Is that right?2012-07-20
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    Yup! your think is right.2012-07-20
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    daniell// I'm sorry. I really didn't know where to go to solve my question... :(2012-07-20
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    My bad. I think Raskolnikov has interpreted your question correctly.2012-07-20
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    Two comments: (i) If you have fortune tellers who are known to be bad (say probability of being right is $35\%$), use $10$ of them, take a majority vote, do the opposite! (ii) The assumption of **independence** that one uses in an explicit probability calculation is probably unreasonable.2012-07-20

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