In an exam 70% passes in hindi,65% in maths,and 27% failed in both subjects the pass percentage is..
1.83%
2.73%
3.62%
4.52%

• assume there are 100 students
  hindi failed=30
  maths failed=35
  both failed=27
  hindi failed alone=30-27=3
  maths failed alone=35-27=8
  total failures=3+8+27=38
  pass percentage=100-38=62% is the ans!!!!
  
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• 
  Ans: 62%
  
  Let total number of students 100
  
  Students passed in Hindi n(H) = 70
  Students passed in Maths n(M) = 65
  Students failed in Hindi and Maths n(H'andM') = 27
  
  Hence students passed in both subject n(H and M) = 73
  Numbers of students passed in any subject n(H or M) = ?
  
  n(H or M) = n(H) + n(M) - n(H and M)
  n(H or M) = 70 + 65 - 73 = 62
  
  i.e 62 out of 100 are passed = 62%
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