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Maths-

General

Easy

Question

In a certain test ai students gave wrong answers to atleast i questions; where i = 1, 2, ---------k and no student gave wrong answers to more than k questions, then number of wrong answers is-
k.ak
k(a1 + a2 + -------------+ ak)
1/k(a1 + a2 + --------+ ak)
(a1 + a2 + ----------+ ak)

The correct answer is: (a1 + a2 + ----------+ ak)

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