Bhanu Chaudhary
Poll
Professional
Asked: 2022-03-10T18:23:19+05:30

In an examination, a student scores 4 marks for every correct answer and losses 1 mark for every wrong answer. A student attempted all the 200 questions stud and scored 200 marks. Find the number of questions he answered correctly.

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In an examination, a student scores 4 marks for every correct answer and losses 1 mark for every wrong answer. A student attempted all the 200 questions stud and scored 200 marks. Find the number of questions he answered correctly.

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    1 Answer

    1. Professional

      Correct Answer: 80

       

      Let the number of correct answers be x

       

      and number of wrong answers be y

       

      Then, 4x – y = 200 …(i)

       

      and x + y = 200 …(ii)

       

      On adding Eqs. (i) and (ii). we get

       

      4x – y = 200

       

      x + y = 200

       

      5x = 400

       

      Therefore, x = 80

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