InterviewSolution
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There are 90 questions in a test. Each correct answer fetches 1 mark, each wrong answer & unanswered question attract a penalty of 1/4 marks & 1/8 marks respectively. Bilbo scored 23 marks in the test. What is the minimum possible number of the questions wrongly answered by him?1). 22). 53). 64). 8 |
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Answer» Here is losing total of 67 MARKS in test (from the all CORRECT situation) If he answers a question wrongly, he should drop by 1.25 marks If he leaves a question unanswered, he is losing 1.125 marks Going through OPTIONS, we find that For option 1) ⇒ Marks lost by questions = 2.5 ⇒ Marks required to be lost by unanswered ques. = 64.5 But 64.5 / 1.125 is not an integer. Hence, it is not possible For option 2) ⇒ Marks lost by question = 6.25 ⇒ Marks required to be lost by unanswered ques. = 60.75 Here, 60.75 / 1.125 is an integer. Hence, it is possible Other two options ALSO doesn’t give an integer. ∴ The minimum number of WRONG answers is 5 |
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