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In a certain test, there are n questions. In this test (n−r)2 students gave wrong answers to at least r questions (1≤r≤n). If total number of wrong answers given is 204, then the value of n is

Answer» In a certain test, there are n questions. In this test (nr)2 students gave wrong answers to at least r questions (1rn). If total number of wrong answers given is 204, then the value of n is


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