in an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. if he attempts all 80 questions and secures 120 marks, the number of questions he attempts correctly, is:
Choose the correct answer.
A) 35	B) 46	C) 42	D) 30	E) 40
<gadget id="calculator">120 + 80</gadget>
<output>200</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">200 / 5</gadget>
<output>40</output>

<result>E</result>
in an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. if he attempts all 80 questions and secures 120 marks, the number of questions he attempts correctly, is:
divide(add(120, 80), add(4, 1))
"let the number of correct answers be x . number of incorrect answers = ( 80 â € “ x ) . 4 x â € “ 1 ( 80 â € “ x ) = 120 or 5 x = 200 or x = 40 . answer : e"