In an objective examination of 90 questions, 5 marks are allotted for every correct answer and 2 marks are… · ABC26GN0870
Subject: General Aptitude · Chapter: Simplification · Exam: M.A.T. 2007
In an objective examination of 90 questions, 5 marks are allotted for every correct answer and 2 marks are deducted for every wrong answer. After attempting all the 90 questions a student got a total of 387 marks. Find the number of questions that he attempted wrong.
Answer
No answer key was printed for this question.
Explanation
Let the number of questions attempted correctly be x. Then, number of questions attempted wrong = (90 – x) \ 5x – 2(90 – x) = 387 ⇔ 7x = 387 + 180 = 567 ⇔ x = 81. Hence, number of questions attempted wrong = (90 – 81) = 9.
Explanation as extracted from the printed page; notation may be imperfect.