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In a certain test ai students gave wrong answers to at least i questions where i = 1, 2, 3, ....k. No student gave more than k wrong answers. The total number of wrong answers given is

Answer»

In a certain test ai students gave wrong answers to at least i questions where i = 1, 2, 3, ....k. No student gave more than k wrong answers. The total number of wrong answers given is



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