a test has 50 qns. a student asores 1 mark for a correct ans, -.33 for a wrong ans, -.1666 for not attemptin a qn, if the net score of a student is 32, the no of qns answered wrongly by that student cannot e less than ???

• 3...!
  see.. let x be no of attempted questions, y be no of incorrect, z be no of not attempted...
  total = 50.. => x+y+z=50..
  and also x-(y/3)-(z/6)=32... (as 1/3 marks are deducted for incorrect ones and 1/6 marks are deducted for not attempting a question.. )
  solve these two .. u will get y=7x-242... substitute the nearest poss integer.. 35*7-242= 3.. implies.. 35 were correct.. 3 were wrong.. 12 were not attempted..
• 12 years agoHelpfull: Yes(21) No(0)