A test has 80 questions. There is one mark for a correct answer, while there is a negative penalty of -1/2 for a wrong answer and -1/4 for an unattempted question. What is the number of questions answered correctly, if the student has scored a net total of 34.5 marks.

• Data is not sufficient.
  
  @BRAHMDEEP ANEJA How can you take both unanswered and incorrect answer equal.
• 8 years agoHelpfull: Yes(2) No(0)
• Questions answered correctly = 44
  
  
  Solution:
  Let correct answers = x
  unattempted or incorrect answers= y which will constitute: (-1/2y) + (-1/4y) = -3/4y to the total score.
  
  Therefore, ATQ,
  1*x + (-3/4y) = 34.5 --------a
  also x + y = 80 -----------b
  
  putting value of y from b into a
  
  x - 3/4(80 - x) = 34.5
  
  solving this, x= 44 which are the correctly answered questions.
  
  
  
• 9 years agoHelpfull: Yes(1) No(7)
• let the number of questions answere be x,and unaswered or wrong be 80-x
  
  now,
  x+(80-x)(-1/2-1/4)=34.5
  7x=378
  x=54.
  54 questions are answered correctly
  
• 9 years agoHelpfull: Yes(1) No(5)
• Cannot be determined
• 8 years agoHelpfull: Yes(1) No(0)
• 40 answered
  22 wrong
  18 not attemt
• 9 years agoHelpfull: Yes(0) No(1)
• 46 is d correct answer
• 9 years agoHelpfull: Yes(0) No(1)
• @ANAND SINGH
  check Arunsharma Number systems Lod I question number 73.The answer is given at the back and Unfortunately the answer is 48
• 8 years agoHelpfull: Yes(0) No(0)