In a management entrance test, a student score 2 marks for every correct answer and loses 0.5 marks fro every wrong answer.A student attempts all the 100 questions and score 120 marks.The number of question he answered correctly was?

• no of questions answered correct 68
  
  no of questions answered correct =x and no of questions answered wrong are y
  x+y=100 ----->eq1
  2x -0.5y= 120
  4x - y = 120 --->eq2
  eq1 + eq2 =>
  5x=340
  x=68 & y = 32
• 9 years agoHelpfull: Yes(0) No(0)
• by making the equation
  x+y=100
  2X+.5Y=120
  solve these equation ams is
  x=68,y=32
  where x=correct question ,y=incorrect question
• 9 years agoHelpfull: Yes(0) No(0)