In an examination, a student scores 3 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 30 questions and secures 130 marks, the no of questions he attempts correctly is : Pick: A) A)35 B) B)40 C) C)90 D) D)88 E) E)37
Let the number of correct answers be X.   Number of incorrect answers = (60 – X).   3x – (30 – x) = 130   =&gt; 4x = 160   =&gt; x = 40   Answer:40
<result>B</result>
In an examination, a student scores 3 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 30 questions and secures 130 marks, the no of questions he attempts correctly is :