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In a certain test there are n questions. In the test 2n−i students gave wrong answers to at least i questions, where i=1,2,........n.If the total number of wrong answers given is 2047, then n is equal to

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In a certain test there are n questions. In the test 2ni students gave wrong answers to at least i questions, where i=1,2,........n.If the total number of wrong answers given is 2047, then n is equal to





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