To clear a screening test to get a Music Contract, Ajit is given with a Question paper with 10 Questions where each Question is a lyrics either written by Zulgar or by Vajed. He does not know the Lyricist in any question so he asks the producer for hint. If he randomly mark Zulgar as answer in seven songs he will get at least six correct answers . So how many answer key combinations are possible ?

• I think ans should be 11
  because for at least 6 to be right among 7,question paper must have either 9 or 10 answers as zulgar,
  so answer sheet combination must be.. 10 types(when 1 is not zulgar)+1(when all are gulgar)..
• 10 years agoHelpfull: Yes(5) No(0)
• Please check whether i did it Right or Wrong
  
  If Ajit randomly mark Zulgar as answer in Seven Questions he will get at least six correct answers. So out of 10 Questions 9 Lyrics should be written by Zulgar & 1 Lyrics should be written by Vajed.
  So possible answer key combinations are 10C1 or 10C9 = 10 [Answer]
• 10 years agoHelpfull: Yes(0) No(5)