Question 115

In an examination a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks, the number of questions he attempts correctly is

Solution

let the number of correct questions be y

and hence incorrect will be 75-y as total questions are 75

it is given that a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer

hence 4y - 1(75-y) = 125

5y - 75 = 125

5y = 200

y = 40

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