In an examination, a student scores 6 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 60 questions and secures 280 marks, the no of questions he attempts correctly is : Choose the correct choice from the following choices:  A) A)20  B) B)38  C) C)90  D) D)88  E) E)37
Let the number of correct answers be X.   Number of incorrect answers = (60 – X).   6x – (60 – x) = 280   =&gt; 7x = 340   =&gt; x = 20   20nswer:20
<result>A</result>
In an examination, a student scores 6 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 60 questions and secures 280 marks, the no of questions he attempts correctly is :