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      Question

      A candidate just passed by getting 15 answers correct by

      attempting 25 of the total questions. Find the total number of questions in the examination if a candidate needs 60% marks. (All questions carry equal marks)
      A 15 Correct Answer Incorrect Answer
      B 25 Correct Answer Incorrect Answer
      C 20 Correct Answer Incorrect Answer
      D 40 Correct Answer Incorrect Answer

      Solution

      Let the total number of questions be x. then, Percentage need in exam = 60% marks obtained = 15 percentage = (marks obtained)/(total marks) 100 60 = 100 x = 25 Alternate method Given that 15 ≡ 60% 1 ≡ 4% 25 ≡ 100% total number of questions = 25

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