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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